Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities
Net Income	$ 15,928	$ 28,789	$ 135,536
Adjustments to Reconcile Net Income to Net Cash Provided by (Used in) Operating Activities:
Depreciation and amortization	32,571	31,421	28,389
Non-cash operating lease cost	8,215	7,267	3,349
Inventory write-down and property and equipment impairment due to restructuring	882	1,610	0
Stock-based compensation expense	15,045	10,744	11,212
Deferred income taxes	(9,832)	(9,392)	1,768
Provision for (recovery of) credit losses	1,417	(509)	(454)
Noncash loss on extinguishment of debt	0	295	0
Recognition of insurance recoveries	(3,886)	0	0
Gain on sale-leaseback	0	0	(132,522)
Other	411	1,060	(505)
Changes in Assets and Liabilities:
Accounts receivable	1,998	(31,188)	(11,689)
Contract assets	13,604	(14,885)	(22,377)
Inventories	(15,979)	(20,841)	(17,129)
Production cost of contracts	(2,825)	8	(2,311)
Other assets	(4,330)	(1,354)	(4,902)
Accounts payable	(18,420)	24,222	2,793
Contract liabilities	6,424	4,991	13,813
Operating lease liabilities	(7,618)	(6,473)	(3,531)
Accrued and other liabilities	(2,538)	6,915	(2,005)
Net Cash Provided by (Used in) Operating Activities	31,067	32,680	(565)
Cash Flows from Investing Activities
Purchases of property and equipment	(19,522)	(19,689)	(16,863)
Proceeds from sale-leaseback	0	0	143,100
Proceeds from sale of assets	404	82	553
Proceeds from life insurance	0	0	439
Payments for acquisition of BLR Aerospace L.L.C., net of cash acquired	(114,378)	0	0
Post closing cash received from (payments for acquisition of) Magnetic Seal LLC, net of cash acquired	0	365	(69,479)
Net Cash (Used in) Provided by Investing Activities	(133,496)	(19,242)	57,750
Cash Flows from Financing Activities
Borrowings from senior secured revolving credit facility	176,500	4,000	96,000
Repayments of senior secured revolving credit facility	(152,700)	(4,000)	(121,000)
Borrowings from term loans	0	250,000	0
Repayments of term loans	(6,250)	(289,274)	(7,926)
Repayments of other debt	(336)	(344)	(362)
Debt issuance costs	0	(2,511)	0
Proceeds from issuance of common stock in public offering, net of issuance costs	85,107	0	0
Net cash paid upon issuance of common stock under stock plans	(3,275)	(1,379)	(4,047)
Net Cash Provided by (Used in) Financing Activities	99,046	(43,508)	(37,335)
Net (Decrease) Increase in Cash and Cash Equivalents	(3,383)	(30,070)	19,850
Cash and Cash Equivalents at Beginning of Year	46,246	76,316	56,466
Cash and Cash Equivalents at End of Year	$ 42,863	$ 46,246	$ 76,316