CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES:
Net income	$ 11,648	$ 8,384
Adjustments to reconcile net income to net cash provided by operating activities:
Loss from discontinued operations, net of tax	0	3,348
Depreciation and amortization	18,253	11,800
Deferred income tax	942	1,341
Amortization of debt issuance costs	616	530
Non-cash interest expense	2,064	1,859
Loss (gain) on disposal of property and equipment	61	(19)
Change in fair value of contingent consideration	131	125
Share-based compensation	3,246	2,288
Excess tax benefits from stock-based compensation arrangements	(1,808)	(1,121)
Changes in assets and liabilities, net of business acquisitions:
Accounts receivable	(18,440)	554
Inventories	(8,104)	(4,864)
Prepaid expenses and other current assets	2,016	4,829
Other non-current assets	(601)	(568)
Accounts payable, accrued expenses and other current liabilities	8,006	(4,347)
Deferred revenue	1,527	(769)
Other non-current liabilities	(386)	1,521
Net cash provided by operating activities of continuing operations	19,171	24,891
Net cash provided by operating activities of discontinued operations	0	6,728
Net cash provided by operating activities	19,171	31,619
INVESTING ACTIVITIES:
Purchases of property and equipment	(10,895)	(5,330)
Sale of property and equipment	0	1,438
Cash received from business acquisition purchase price adjustment	0	1,831
Change in restricted cash	4,165	0
Net cash used in investing activities of continuing operations	(6,730)	(2,061)
Net cash used in investing activities of discontinued operations	0	(3,571)
Net cash used in investing activities	(6,730)	(5,632)
FINANCING ACTIVITIES:
Borrowings under senior credit facility	15,000	0
Repayments under senior credit facility	(1,875)	(15,000)
Principal payments under capital lease obligations	(160)	(178)
Proceeds from exercised stock options	1,038	231
Excess tax benefits from stock-based compensation arrangements	1,808	1,121
Net cash provided by (used in) financing activities	15,811	(13,826)
Effect of exchange rate changes on cash and cash equivalents	702	(4,284)
Net increase in cash and cash equivalents	28,954	7,877
Cash and cash equivalents at beginning of period	48,132	71,994
Cash and cash equivalents at end of period	$ 77,086	$ 79,871