Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities
Net Income	$ 28,789	$ 135,536	$ 29,174
Adjustments to Reconcile Net Income to Net Cash Provided by (Used in) Operating Activities:
Depreciation and amortization	31,421	28,389	28,850
Non-cash operating lease cost	7,267	3,349	3,157
Inventory write-down and property and equipment impairment due to restructuring	1,610	0	0
Stock-based compensation expense	10,744	11,212	9,299
Deferred income taxes	(9,392)	1,768	327
(Recovery of) provision for credit losses	(509)	(454)	231
Noncash loss on extinguishment of debt	295	0	0
Insurance recoveries related to loss on operating assets	0	0	8,546
Gain on sale-leaseback	0	(132,522)	0
Other	1,060	(505)	826
Changes in Assets and Liabilities:
Accounts receivable	(31,188)	(11,689)	8,877
Contract assets	(14,885)	(22,377)	(47,358)
Inventories	(20,841)	(17,129)	(20,183)
Production cost of contracts	8	(2,311)	(1,488)
Other assets	(1,354)	(4,902)	(212)
Accounts payable	24,222	2,793	(19,714)
Contract liabilities	4,991	13,813	13,747
Operating lease liabilities	(6,473)	(3,531)	(2,953)
Accrued and other liabilities	6,915	(2,005)	1,485
Net Cash Provided by (Used in) Operating Activities	32,680	(565)	12,611
Cash Flows from Investing Activities
Purchases of property and equipment	(19,689)	(16,863)	(12,510)
Proceeds from sale-leaseback	0	143,100	0
Proceeds from sale of assets	82	553	5
Insurance recoveries related to property and equipment	0	0	4,954
Proceeds from life insurance	0	439	1,889
Post closing cash received from (payments for acquisition of) Magnetic Seal LLC, net of cash acquired	365	(69,479)	0
Post closing cash received from the acquisition of Nobles Worldwide, Inc., net	0	0	190
Net Cash (Used in) Provided by Investing Activities	(19,242)	57,750	(5,472)
Cash Flows from Financing Activities
Borrowings from senior secured revolving credit facility	4,000	96,000	65,900
Repayments of senior secured revolving credit facility	(4,000)	(121,000)	(40,900)
Borrowings from term loans	250,000	0	0
Repayments of term loans	(289,274)	(7,926)	(14,362)
Repayments of other debt	(344)	(362)	(288)
Debt issuance costs	(2,511)	0	0
Net cash paid upon issuance of common stock under stock plans	(1,379)	(4,047)	(607)
Net Cash (Used in) Provided by Financing Activities	(43,508)	(37,335)	9,743
Net (Decrease) Increase in Cash and Cash Equivalents	(30,070)	19,850	16,882
Cash and Cash Equivalents at Beginning of Year	76,316	56,466	39,584
Cash and Cash Equivalents at End of Year	$ 46,246	$ 76,316	$ 56,466