Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net income	$ 28,848	$ 29,076
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,786	19,122
Gain on disposition of property, plant and equipment	(252)	(1,334)
Stock compensation expense	3,011	2,577
Withholding taxes paid on stock issuances	(369)	(488)
Changes in assets and liabilities:
Accounts receivable	(4,213)	(13,777)
Inventories	(153)	(6,229)
Prepaid expenses and other current assets	(524)	(5,944)
Accounts payable	(285)	9,921
Accrued liabilities	2,248	(13,493)
Deferred income taxes	251	3,740
Long-term retirement benefits	(16,631)	(2,878)
Other	(601)	2,373
Net cash provided by operating activities	30,116	22,666
Investing activities:
Proceeds from disposition of property, plant and equipment	313	2,010
Capital expenditures	(13,297)	(10,960)
Business acquisitions	(1,546)	0
Component Repair Program payments	(900)	0
Other	0	(321)
Net cash used by investing activities	(15,430)	(9,271)
Financing activities:
Net change in other borrowings	(14,179)	8,425
Payments on long-term debt	(69,013)	(55,821)
Proceeds from the issuance of long-term debt	76,503	26,722
Proceeds from the issuance of common stock	196	4,956
Common stock repurchases	(8,000)	0
Dividends paid	(6,468)	(6,571)
Excess tax benefit on stock awards	44	914
Other	(2,921)	10,033
Net cash used by financing activities	(23,838)	(11,342)
Effect of exchange rate changes on cash flows	2,085	(2,470)
Decrease in cash and cash equivalents	(7,067)	(417)
Cash and cash equivalents at beginning of period	83,926	46,039
Cash and cash equivalents at end of period	$ 76,859	$ 45,622