v3.26.1
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Operating Activities:    
Net income $ 139,437 $ 129,327
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 6,496 5,215
Stock-based compensation 4,280 3,675
Unrealized mark-to-market (gain) loss on derivative contracts (354) (433)
Bad debt expense (recovery), net 107 (149)
Deferred income taxes 11,636 (2,847)
Gain on cash surrender value of life insurance (118) 0
Changes in operating assets and liabilities:    
Accounts receivable, net (146,438) 2,747
Contract assets and liabilities, net 188,763 (18,381)
Inventories (11,064) (2,728)
Income taxes (11,088) (2,543)
Prepaid expenses and other current assets (4,347) 1,051
Accounts payable 15,973 (7,513)
Accrued liabilities (766) (2,216)
Other, net 2,521 1,657
Net cash provided by operating activities 195,038 106,862
Investing Activities:    
Purchases of short-term investments 0 (37,262)
Maturities of short-term investments 24,857 44,407
Purchases of property, plant and equipment (10,386) (11,380)
Proceeds from sale of property, plant and equipment 17 20
Net cash provided by (used in) investing activities 14,488 (4,215)
Financing Activities:    
Shares withheld in lieu of employee tax withholding (14,698) (12,030)
Dividends paid (9,792) (9,640)
Net cash used in financing activities (24,490) (21,670)
Net increase in cash and cash equivalents 185,036 80,977
Effect of exchange rate changes on cash and cash equivalents (2,214) 2,158
Cash and cash equivalents at beginning of period 450,739 315,331
Cash and cash equivalents at end of period $ 633,561 $ 398,466