CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities:
Net income	$ 55,900	$ 30,800	$ 33,100
Loss from discontinued operations, net of income taxes	100	0	900
Income from continuing operations	56,000	30,800	34,000
Adjustments to reconcile net income from continuing operations to cash provided by operating activities of continuing operations:
Depreciation	20,000	19,100	20,600
Amortization	9,600	6,200	4,400
Stock-based compensation	7,200	7,300	6,900
Pension and other post-retirement benefits expense	(1,400)	2,700	1,300
Deferred income taxes	5,800	4,900	5,700
Other	100	(900)	(3,500)
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade receivables, net	(11,300)	9,800	800
Inventories	15,600	7,700	(9,600)
Accounts payable, trade and other	10,400	2,100	(1,900)
Advance payments and progress billings	26,900	1,400	14,100
Accrued pension and other post-retirement benefits, net	(14,300)	(19,900)	(10,700)
Other assets and liabilities, net	(12,400)	6,800	1,000
Cash provided by continuing operating activities	112,200	78,000	63,100
Net cash required by discontinued operating activities	(300)	(300)	(1,100)
Cash provided by operating activities	111,900	77,700	62,000
Cash Flows From Investing Activities:
Acquisitions, net of cash acquired	(150,900)	(91,300)	0
Capital expenditures	(37,700)	(36,700)	(29,200)
Proceeds from disposal of assets	1,500	1,400	1,100
Proceeds from property available for sale	2,000	0	0
Cash required by investing activities	(185,100)	(126,600)	(28,100)
Cash Flows From Financing Activities:
Net increase (decrease) in short-term debt	(1,500)	1,500	(300)
Cash provided by refinancing credit facility	183,700	0	0
Cash payments to settle existing credit facility	(183,700)	0	0
Net borrowings (payments) on credit facilities	184,300	77,500	(97,000)
Issuance of long-term debt	0	4,500	8,000
Cash payments to settle private placement debt	(75,000)	0	0
Repayment of long-term debt	(1,400)	(5,600)	(200)
Excess tax benefits	2,200	1,000	500
Tax witholdings on stock-based compensation awards	(5,800)	(3,600)	(2,300)
Purchase of treasury stock	(7,700)	(2,800)	(200)
Dividends	(11,200)	(10,700)	(10,100)
Other	0	100	0
Cash provided (required) by financing activities	83,900	61,900	(101,600)
Effect of foreign exchange rate changes on cash and cash equivalents	(6,800)	(9,100)	(1,900)
Increase (decrease) in cash and cash equivalents	3,900	3,900	(69,600)
Cash and cash equivalents, beginning of period	33,300	29,400	99,000
Cash and cash equivalents, end of period	37,200	33,300	29,400
Supplemental Cash Flow Information:
Interest paid	7,700	7,700	6,700
Income taxes paid	$ 13,800	$ 8,200	$ 7,700