CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net income	$ 42,795	$ 27,048	$ 55,567
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	42,743	35,231	30,792
Deferred income taxes	7,672	469	(9,731)
(Income) loss from discontinued operations	684	394	(14,389)
Restructuring charges	5,183	2,956	1,637
Impairment charges	218	96	884
(Gains) losses on dispositions of property and other assets	(54)	(690)	(958)
Share-based compensation expense	8,038	3,848	2,930
Excess tax benefit from share-based compensation arrangements	(95)	(418)	(114)
Other non-cash items, net	6,167	5,394	5,386
Change in operating assets and liabilities (excluding the impact of acquisitions):
Receivables	(9,358)	(16,665)	(10,441)
Inventories	(2,646)	4,872	(2,555)
Accounts payable	1,770	(2,619)	18,128
Restructuring liabilities	(3,866)	(2,572)	(5,276)
Accrued compensation	(353)	1,469	3,663
Customer deposits	8,429	408	(6,406)
Income taxes payable	(4,630)	67	1,543
Other assets and liabilities, net	(2,379)	989	(12,570)
Net cash provided by operating activities	100,318	60,277	58,090
Cash flows from investing activities
Capital expenditures	(49,815)	(29,839)	(29,389)
Cash paid for acquired businesses, net	(195,989)	(430)	(120,251)
Proceeds from dispositions of property and other assets	1,166	1,542	1,109
Proceeds from possessory interest and personal property - discontinued operations			28,000
Net cash used in investing activities	(244,638)	(28,727)	(120,531)
Cash flows from financing activities
Proceeds from borrowings	229,701	50,000	189,512
Payments on debt and capital lease obligations	(108,915)	(62,969)	(61,461)
Dividends paid on common stock	(8,111)	(8,036)	(38,387)
Debt issuance costs	(336)		(1,671)
Common stock purchased for treasury	(722)	(4,816)	(12,321)
Excess tax benefit from share-based compensation arrangements	95	418	114
Acquisition of business - deferred consideration	(130)	(896)
Proceeds from exercise of stock options		1,041	1,155
Net cash provided by (used in) financing activities	111,582	(25,258)	76,941
Effect of exchange rate changes on cash and cash equivalents	(2,893)	(6,751)	(3,331)
Net change in cash and cash equivalents	(35,631)	(459)	11,169
Cash and cash equivalents, beginning of year	56,531	56,990	45,821
Cash and cash equivalents, end of period	$ 20,900	$ 56,531	$ 56,990