Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net income	$ 121,380	$ 118,370	$ 270,527
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	78,242	81,395	65,052
Amortization of convertible debt discount	0	731	2,391
(Gain) loss on disposition of property, plant and equipment	(1,128)	143	(887)
Stock compensation expense	9,258	7,603	18,128
Withholding taxes paid on stock issuances	(4,913)	(4,367)	(2,090)
Loss (gain) on the sale of businesses	0	(1,586)	313,708
Pension lump-sum settlement charge	9,856	0	0
Changes in assets and liabilities, net of the effects of acquisitions/divestitures:
Accounts receivable	14,027	(21,367)	(23,764)
Inventories	(1,190)	(10,092)	2,079
Prepaid expenses and other current assets	(2,645)	(7,137)	(2,172)
Accounts payable	(2,936)	8,123	2,384
Accrued liabilities	(16,833)	24,402	(9,891)
Deferred income taxes	3,121	(9,841)	3,412
Long-term retirement benefits	1,081	(7,584)	(642)
Other	2,575	4,933	(729)
Net cash provided by operating activities	209,895	186,898	10,090
Investing activities:
Proceeds from disposition of property, plant and equipment	3,442	849	1,767
(Payments for) proceeds from the sale of businesses	0	(1,181)	538,942
Change in restricted cash	0	4,886	0
Capital expenditures	(45,982)	(57,365)	(57,304)
Business acquisitions, net of cash acquired	(51,954)	0	(307,264)
Component Repair Program payments	(21,000)	(70,100)	(16,639)
Other	0	(1,338)	(2,058)
Net cash (used) provided by investing activities	(115,494)	(124,249)	157,444
Financing activities:
Net change in other borrowings	14,680	7,009	(2,753)
Payments on long-term debt	(171,198)	(332,336)	(555,195)
Proceeds from the issuance of long-term debt	159,264	293,291	450,253
Payment of assumed liability to Otto Männer Holding AG	0	(19,796)	0
Premium paid on convertible debt redemption	0	(14,868)	0
Proceeds from the issuance of common stock	11,425	11,460	13,491
Common stock repurchases	(52,103)	(8,389)	(68,608)
Dividends paid	(26,176)	(24,464)	(22,422)
Excess tax benefit on stock awards	2,667	4,888	3,899
Other	9,850	(338)	(1,472)
Net cash used by financing activities	(51,591)	(83,543)	(182,807)
Effect of exchange rate changes on cash flows	(4,923)	(3,923)	(227)
Increase (decrease) in cash and cash equivalents	37,887	(24,817)	(15,500)
Cash and cash equivalents at beginning of year	46,039	70,856	86,356
Cash and cash equivalents at end of year	83,926	46,039	70,856
Supplemental Disclosure of Cash Flow Information:
Intangible assets acquired	$ 3,200	$ 19,000	$ 10,000
Treasury shares issued (in shares)			1,032,493
Treasury shares issued			$ (36,695)