Condensed Consolidated Statements of Shareholders' Equity and Redeemable Noncontrolling Interest (Unaudited) (Parentheticals) - USD ($) $ in Thousands |
3 Months Ended | |||||
|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
|
| Common Class A [Member] | ||||||
| Dividends declared (in dollars per share) | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 |
| Common Class B [Member] | ||||||
| Dividends declared (in dollars per share) | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 |
| Foreign currency translation adjustment, tax expense | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |
| Unrealized losses (gain) on interest rate swap cash flow hedge, tax | 0 | 0 | 0 | 0 | 0 | 0 |
| Unrealized gain on marketable securities arising during the period, tax | 0 | 0 | 0 | 0 | ||
| Change in unfunded SERP liability, tax | $ 3 | $ 2 | $ 3 | $ 8 | $ 8 | $ 8 |