v3.26.1
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Operating Activities:    
Net income $ 87,277 $ 81,093
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 4,331 3,473
Stock-based compensation 2,842 2,544
Unrealized mark-to-market loss (gain) on derivative contracts 3 (23)
Bad debt expense (recovery), net (17) (130)
Deferred income taxes 7,184 (1,271)
Changes in operating assets and liabilities:    
Accounts receivable, net (21,364) 9,963
Contract assets and liabilities, net 39,822 (16,927)
Inventories (1,683) (3,962)
Income taxes (12,251) (7,459)
Prepaid expenses and other current assets (3,278) 2,810
Accounts payable 7,172 257
Accrued liabilities (16,244) (13,713)
Other, net 1,017 2,825
Net cash provided by operating activities 94,811 59,480
Investing Activities:    
Purchases of short-term investments 0 (22,614)
Maturities of short-term investments 17,824 33,421
Purchases of property, plant and equipment (3,861) (6,263)
Proceeds from sale of property, plant and equipment 4 20
Net cash provided by investing activities 13,967 4,564
Financing Activities:    
Shares withheld in lieu of employee tax withholding (14,495) (11,995)
Dividends paid (6,513) (6,412)
Net cash used in financing activities (21,008) (18,407)
Net increase in cash and cash equivalents 87,770 45,637
Effect of exchange rate changes on cash and cash equivalents (797) (1,426)
Cash and cash equivalents at beginning of period 450,739 315,331
Cash and cash equivalents at end of period $ 537,712 $ 359,542