CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Consolidated net income (loss)	$ (24,242)	$ 7,331	$ 19,578
Less: Loss from discontinued operations, net of tax	7,333	2,646	8,719
Income (loss) from continuing operations	(16,909)	9,977	28,297
Adjustments to reconcile income (loss) from continuing operations to net cash provided by operating activities of continuing operations:
Depreciation and amortization	23,797	19,570	12,458
Provision for inventory excess and obsolescence	832	1,582	1,853
Impairment of goodwill and intangible assets	41,442	0	0
Share-based compensation	4,329	5,442	4,534
Deferred income taxes	(6,736)	3,886	(17,430)
Earnings from equity investment	(2,700)	(1,469)	(556)
Non-cash interest expense	1,379	965	1,049
Other non-cash items	1,586	1,230	422
Changes in assets and liabilities which provided (used) cash, excluding effects from businesses purchased or classified as held for sale:
Accounts receivable	3,526	(1,826)	(2,330)
Inventories	(991)	(1,688)	(1,889)
Prepaid expenses and other current assets	(527)	854	282
Income taxes receivable	(206)	10,848	6,161
Accounts payable, accrued expenses, deferred revenue and other current liabilities	(4,698)	5,958	7,155
Long-term income taxes payable	(158)	532	(6,291)
Other non-current assets and liabilities	24	317	(627)
Cash provided by operating activities of continuing operations	43,990	56,178	33,088
Cash used in operating activities of discontinued operations	(1,701)	(6,978)	(4,658)
Cash provided by operating activities	42,289	49,200	28,430
Cash flows from investing activities:
Purchases of property, plant and equipment	(5,415)	(4,777)	(3,521)
Acquisition of businesses, net of cash acquired and escrow recovery	(88,238)	(80,773)
Proceeds from the sale of property, plant and equipment	112	253	168
Cash used in investing activities of continuing operations	(93,541)	(85,297)	(3,353)
Cash provided by investing activities of discontinued operations	3,768	12,341	6,328
Cash provided by (used in) investing activities	(89,773)	(72,956)	2,975
Cash flows from financing activities:
Borrowings under revolving credit facility	77,000	60,000	5,000
Repayments of long-term debt and revolving credit facility	(33,500)	(38,500)	(23,000)
Payments for debt issuance costs	(712)	(145)	(1,826)
Payments of withholding taxes from stock-based awards	(1,666)	(1,495)	(543)
Other financing activities	(841)	(1,286)	(743)
Cash provided by (used in) financing activities of continuing operations	40,281	18,574	(21,112)
Cash provided by (used in) financing activities of discontinued operations	0	0	0
Cash provided by (used in ) financing activities	40,281	18,574	(21,112)
Effect of exchange rates on cash and cash equivalents	(2,631)	374	660
Increase (decrease) in cash and cash equivalents	(9,834)	(4,808)	10,953
Cash and cash equivalents, beginning of year	60,980	65,788	54,835
Cash and cash equivalents, end of year	51,146	60,980	65,788
Supplemental disclosure of cash flow information:
Cash paid for interest	3,793	2,291	2,067
Cash paid for income taxes	6,087	2,197	3,440
Income tax refunds received	931	12,607	222
Supplemental disclosure of non-cash investing activity:
Accrual for capital expenditures	26	184	925
Supplemental disclosure of non-cash financing activity:
Assets acquired under capital lease obligation	$ 10,438	$ 0	$ 0