Consolidated Statement of Stockholders' Equity (unaudited) - USD ($)
shares in Millions, $ in Millions |
Total |
Trinity Stockholders’ Equity |
Common Stock |
Capital in Excess of Par Value |
Retained Earnings |
Accumulated other comprehensive income (loss) |
Treasury Stock |
Noncontrolling Interest |
| $0.01 Par Value |
|
$ 0.01
|
|
|
|
|
|
|
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(81.8)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.0
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2024 |
|
$ 1,307.2
|
$ 1,058.9
|
$ 0.8
|
$ 8.8
|
$ 1,054.1
|
$ (4.2)
|
$ (0.6)
|
$ 248.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Net income |
|
27.1
|
22.1
|
|
|
22.1
|
|
|
5.0
|
| Other comprehensive income |
|
0.1
|
0.0
|
|
|
|
0.0
|
|
0.1
|
| Cash dividends declared on common stock (1) |
[1] |
(24.6)
|
(24.6)
|
|
|
(24.6)
|
|
|
|
| Distributions to noncontrolling interest |
|
(6.9)
|
|
|
|
|
|
|
(6.9)
|
| Stock-based compensation expense |
|
5.3
|
5.3
|
|
5.3
|
|
|
|
|
| Settlement of share-based awards, net |
|
(0.3)
|
(0.3)
|
|
|
|
|
$ (0.3)
|
|
| Treasury Stock, Shares, Acquired |
|
|
|
|
|
|
|
(0.3)
|
|
| Treasury Stock, Value, Acquired, Cost Method |
|
(8.2)
|
(8.2)
|
|
|
|
|
$ (8.2)
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2025 |
|
$ 1,299.7
|
1,053.2
|
0.8
|
14.1
|
1,051.6
|
(4.2)
|
(9.1)
|
246.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Dividends, Per Share, Declared |
|
$ 0.30
|
|
|
|
|
|
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2024 |
|
$ 1,307.2
|
1,058.9
|
0.8
|
8.8
|
1,054.1
|
(4.2)
|
(0.6)
|
248.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Net income |
|
83.1
|
|
|
|
|
|
|
|
| Other comprehensive income |
|
0.5
|
|
|
|
|
|
|
|
| Noncontrolling Interest, Decrease from Deconsolidation |
|
0.0
|
|
|
|
|
|
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2025 |
|
1,250.4
|
1,001.0
|
$ 0.8
|
6.0
|
1,018.9
|
(3.9)
|
$ (20.8)
|
249.4
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(81.8)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.3
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Mar. 31, 2025 |
|
1,299.7
|
1,053.2
|
$ 0.8
|
14.1
|
1,051.6
|
(4.2)
|
$ (9.1)
|
246.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Net income |
|
20.0
|
14.1
|
|
|
14.1
|
|
|
5.9
|
| Other comprehensive income |
|
0.1
|
0.0
|
|
|
|
0.0
|
|
0.1
|
| Cash dividends declared on common stock (1) |
[1] |
(24.7)
|
(24.7)
|
|
|
(24.7)
|
|
|
|
| Distributions to noncontrolling interest |
|
(3.8)
|
|
|
|
|
|
|
(3.8)
|
| Stock-based compensation expense |
|
5.4
|
5.4
|
|
5.4
|
|
|
|
|
| Restricted shares, net, (in shares) |
|
|
|
(0.9)
|
|
|
|
(0.3)
|
|
| Settlement of share-based awards, net |
|
(7.9)
|
(7.9)
|
|
0.1
|
|
|
$ (8.0)
|
|
| Treasury Stock, Shares, Acquired |
|
|
|
|
|
|
|
(1.2)
|
|
| Treasury Stock, Value, Acquired, Cost Method |
|
(31.0)
|
(31.0)
|
|
|
|
|
$ (31.0)
|
|
| Treasury Stock, Shares, Retired |
|
|
|
(1.8)
|
|
|
|
(1.8)
|
|
| Retirement of treasury stock |
|
0.0
|
0.0
|
|
(19.6)
|
(28.0)
|
|
$ (47.6)
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2025 |
|
$ 1,257.8
|
1,009.1
|
$ 0.8
|
0.0
|
1,013.0
|
(4.2)
|
$ (0.5)
|
248.7
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Dividends, Per Share, Declared |
|
$ 0.30
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(80.9)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.0
|
|
| Net income |
|
$ 36.0
|
30.3
|
|
|
30.3
|
|
|
5.7
|
| Other comprehensive income |
|
0.3
|
0.3
|
|
|
|
0.3
|
|
0.0
|
| Cash dividends declared on common stock (1) |
[1] |
(24.4)
|
(24.4)
|
|
|
(24.4)
|
|
|
|
| Distributions to noncontrolling interest |
|
(5.0)
|
|
|
|
|
|
|
(5.0)
|
| Stock-based compensation expense |
|
5.9
|
5.9
|
|
5.9
|
|
|
|
|
| Restricted shares, net, (in shares) |
|
|
|
(0.1)
|
|
|
|
|
|
| Settlement of share-based awards, net |
|
(0.2)
|
(0.2)
|
|
0.1
|
|
|
$ (0.3)
|
|
| Treasury Stock, Shares, Acquired |
|
|
|
|
|
|
|
(0.7)
|
|
| Treasury Stock, Value, Acquired, Cost Method |
|
(20.0)
|
(20.0)
|
|
|
|
|
$ (20.0)
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2025 |
|
$ 1,250.4
|
1,001.0
|
$ 0.8
|
6.0
|
1,018.9
|
(3.9)
|
$ (20.8)
|
249.4
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Dividends, Per Share, Declared |
|
$ 0.30
|
|
|
|
|
|
|
|
| $0.01 Par Value |
|
0.01
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(81.0)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.7
|
|
| $0.01 Par Value |
|
$ 0.01
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(79.8)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.0
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2025 |
|
$ 1,145.3
|
1,077.2
|
$ 0.8
|
0.0
|
1,081.5
|
(4.2)
|
$ (0.9)
|
68.1
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Net income |
|
24.8
|
24.2
|
|
|
24.2
|
|
|
0.6
|
| Other comprehensive income |
|
5.2
|
5.2
|
|
|
|
5.2
|
|
0.0
|
| Cash dividends declared on common stock (1) |
[2] |
(25.1)
|
(25.1)
|
|
|
(25.1)
|
|
|
|
| Distributions to noncontrolling interest |
|
(1.8)
|
|
|
|
|
|
|
(1.8)
|
| Stock-based compensation expense |
|
4.9
|
4.9
|
|
4.9
|
|
|
|
|
| Settlement of share-based awards, net |
|
(0.2)
|
(0.2)
|
|
|
|
|
$ (0.2)
|
|
| Treasury Stock, Shares, Acquired |
|
|
|
|
|
|
|
(0.2)
|
|
| Treasury Stock, Value, Acquired, Cost Method |
|
(7.4)
|
(7.4)
|
|
|
|
|
$ (7.4)
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2026 |
|
$ 1,145.7
|
1,078.8
|
0.8
|
4.9
|
1,080.6
|
1.0
|
(8.5)
|
66.9
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Dividends, Per Share, Declared |
|
$ 0.31
|
|
|
|
|
|
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2025 |
|
$ 1,145.3
|
1,077.2
|
0.8
|
0.0
|
1,081.5
|
(4.2)
|
(0.9)
|
68.1
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Net income |
|
140.6
|
|
|
|
|
|
|
|
| Other comprehensive income |
|
21.7
|
|
|
|
|
|
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2026 |
|
1,130.8
|
1,128.3
|
$ 0.8
|
6.3
|
1,127.2
|
17.5
|
$ (23.5)
|
2.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(79.8)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.2
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Mar. 31, 2026 |
|
1,145.7
|
1,078.8
|
$ 0.8
|
4.9
|
1,080.6
|
1.0
|
$ (8.5)
|
66.9
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Net income |
|
98.3
|
98.3
|
|
|
98.3
|
|
|
0.0
|
| Other comprehensive income |
|
7.0
|
7.0
|
|
|
|
7.0
|
|
0.0
|
| Cash dividends declared on common stock (1) |
[2] |
(24.0)
|
(24.0)
|
|
|
(24.0)
|
|
|
|
| Noncontrolling Interest, Decrease from Deconsolidation |
|
64.3
|
|
|
|
|
|
|
64.3
|
| Stock-based compensation expense |
|
5.5
|
5.5
|
|
5.5
|
|
|
|
|
| Restricted shares, net, (in shares) |
|
|
|
(0.8)
|
|
|
|
(0.3)
|
|
| Settlement of share-based awards, net |
|
(9.1)
|
(9.1)
|
|
0.2
|
|
|
$ (9.3)
|
|
| Treasury Stock, Shares, Acquired |
|
|
|
|
|
|
|
(0.4)
|
|
| Treasury Stock, Value, Acquired, Cost Method |
|
(13.4)
|
(13.4)
|
|
|
|
|
$ (13.4)
|
|
| Treasury Stock, Shares, Retired |
|
|
|
(0.9)
|
|
|
|
(0.9)
|
|
| Retirement of treasury stock |
|
0.0
|
0.0
|
|
(10.6)
|
(19.7)
|
|
$ (30.3)
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2026 |
|
$ 1,145.7
|
1,143.1
|
$ 0.8
|
0.0
|
1,135.2
|
8.0
|
$ (0.9)
|
2.6
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Dividends, Per Share, Declared |
|
$ 0.31
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(79.7)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.0
|
|
| Net income |
|
$ 17.5
|
17.6
|
|
|
17.6
|
|
|
(0.1)
|
| Other comprehensive income |
|
9.5
|
9.5
|
|
|
|
9.5
|
|
0.0
|
| Cash dividends declared on common stock (1) |
[2] |
(25.6)
|
(25.6)
|
|
|
(25.6)
|
|
|
|
| Stock-based compensation expense |
|
6.3
|
6.3
|
|
6.3
|
|
|
|
|
| Settlement of share-based awards, net |
|
(0.1)
|
(0.1)
|
|
|
|
|
$ (0.1)
|
|
| Treasury Stock, Shares, Acquired |
|
|
|
|
|
|
|
(0.8)
|
|
| Treasury Stock, Value, Acquired, Cost Method |
|
(22.5)
|
(22.5)
|
|
|
|
|
$ (22.5)
|
|
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2026 |
|
$ 1,130.8
|
$ 1,128.3
|
$ 0.8
|
$ 6.3
|
$ 1,127.2
|
$ 17.5
|
$ (23.5)
|
$ 2.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
|
|
| Common Stock, Dividends, Per Share, Declared |
|
$ 0.31
|
|
|
|
|
|
|
|
| $0.01 Par Value |
|
$ 0.01
|
|
|
|
|
|
|
|
| Common Stock, Shares, Issued |
|
|
|
(79.7)
|
|
|
|
|
|
| Treasury Stock, Common, Shares |
|
|
|
|
|
|
|
0.8
|
|
|
|