CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 28,390	$ 28,352
Adjustments to reconcile net earnings to cash provided by operating activities:
Depreciation	12,712	10,668
Amortization expense (including deferred financing fees)	4,635	1,977
Loss on extinguishment of debt	1,445	0
Inventory obsolescence	775	1,203
Loss on disposal of property, plant and equipment	36	29
Unrealized foreign currency gains	(1,793)	(122)
Stock-based compensation	4,496	5,043
Bad debt and customer claims	673	(1,650)
Changes in assets and liabilities:
Customer receivables	(11,504)	8,420
Inventories	(13,565)	(8,811)
Prepaid and other current assets	804	(1,807)
Accounts payable	7,774	6,015
Current and deferred income taxes	4,138	2,567
Other current liabilities	(4,059)	(13,729)
Other noncurrent assets and liabilities	(1,184)	(5,917)
Cash provided by operating activities	33,773	32,238
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(16,031)	(20,756)
Purchase of businesses, net of cash acquired	(304,088)	0
Cash used in investing activities	(320,119)	(20,756)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from revolving credit facility	339,000	214,000
Repayment of revolving credit facility	(211,000)	(194,000)
Proceeds from term loan	352,499	0
Repayment of term loan	(171,859)	(5,000)
Payment of financing fees	(4,578)	0
Loss on debt extinguishment	(1,023)	0
Payment of dividends	(15,426)	(15,729)
Proceeds from the issuance of common stock	39	551
Purchase of common stock for treasury	(4,395)	(10,570)
Contingent purchase price payment	0	(6,000)
Cash provided by (used in) financing activities	283,257	(16,748)
Effect of exchange rate changes on cash and cash equivalents	2,245	1,336
Net decrease in cash and cash equivalents	(844)	(3,930)
Cash and cash equivalents at beginning of period	2,203	9,854
Cash and cash equivalents at end of period	$ 1,359	$ 5,924