CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITES
Net earnings	$ 17,270	$ 17,435
Adjustments to reconcile net earnings to cash provided by (used in) operating activities:
Depreciation	4,560	4,303
Amortization expense (including deferred financing fees)	989	962
Inventory obsolescence	647	397
Loss on disposal of property, plant and equipment	7	11
Unrealized foreign currency losses (gains)	1,262	(7,271)
Stock-based compensation	2,138	1,385
Bad debt and customer credits	91	476
Changes in assets and liabilities:
Customer receivables	8,570	(9,030)
Inventories	(7,348)	(6,104)
Accounts payable	1,299	(29,318)
Current income taxes	578	3,337
Other current assets	7,749	(1,229)
Other current liabilities	(16,393)	(5,334)
Other noncurrent assets and liabilities	(304)	3,925
Cash provided by (used in) operating activities	21,115	(26,055)
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, net	(7,017)	(4,864)
Cash used in investing activities	(7,017)	(4,864)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from credit facility	99,500	101,000
Repayment of credit facility	(99,500)	(59,000)
Payment of dividends	(7,196)	(5,729)
Proceeds from the issuance of common stock	399	3,826
Purchase of common stock for treasury	(1,902)	(6,067)
Contingent purchase price payment	(5,000)	(5,000)
Tax benefit from the exercise of stock options and vesting of equity awards	141	658
Cash (used in) provided by financing activities	(13,558)	29,688
Effect of exchange rate changes on cash and cash equivalents	616	(3,115)
Net increase (decrease) in cash and cash equivalents	1,156	(4,346)
Cash and cash equivalents at beginning of period	4,192	19,021
Supplemental disclosure of cash flow information:	$ 5,348	$ 14,675