CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net (loss) income	$ (30,240)	$ 23,562	$ (111,560)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	47,593	44,356	42,850
Provision for bad debts	1,208	308	1,052
Stock based compensation for equity classified awards	2,804	1,886	3,250
Pension expense (income)	17	(153)	188
Amortization of inventory fair value adjustment	0	0	30,377
Amortization of deferred financing cost	2,476	2,368	2,275
Cash received on interest rate swap termination, net of non-cash interest income recognized	3,684	0	0
Accretion of contingent consideration	3,781	8,433	30,197
Change in fair value of contingent consideration	(3,018)	(26,948)	(53,608)
Deferred income taxes	1,154	(12,515)	13,792
Impairment of long-lived assets	2,600	0	10,795
Goodwill impairment	0	0	62,373
(Gain) loss on sales of property	(52)	81	22
Other	0	98	32
Changes in operating assets and liabilities:
Accounts receivable	(5,362)	5,981	(4,101)
Inventories	(1,581)	(2,496)	(764)
Prepaid expenses and other current assets	(652)	(5,176)	(7,788)
Accounts payable	(10,955)	(13,889)	6,357
Accrued expenses and other liabilities	(4,175)	18,432	2,341
Income taxes payable	(4,053)	2,844	(376)
Other assets and liabilities	(2,217)	(11,783)	2,780
Net cash provided by operating activities	3,012	35,389	30,484
Cash flows from investing activities:
Cash paid for property and equipment	(4,164)	(7,725)	(6,004)
Proceeds from sale of property	0	99	76
Acquisition of business, net of cash acquired	0	(18,192)	0
Other investments	(1,587)	(11,132)	(600)
Net cash used in investing activities	(5,751)	(36,950)	(6,528)
Cash flows from financing activities:
Payment of Dow liabilities settlement	(10,000)	(10,000)	0
Repayment of long term debt	(6,096)	(4,015)	(4,250)
Payments of contingent consideration	(6,132)	0	0
Borrowings under revolving credit facility	11,000	0	0
Repayments of revolving credit facility	(11,000)	0	0
Repurchase of stock for treasury	0	0	(1,488)
Payment of withholding taxes related to stock-based compensation to employees	0	0	(331)
Net cash used in financing activities	(22,228)	(14,015)	(6,069)
Effect of exchange rate on cash and cash equivalents	(4,714)	2,797	1,660
Net (decrease) increase in cash and cash equivalents	(29,681)	(12,779)	19,547
Cash and cash equivalents, beginning of period	64,533	77,312	57,765
Cash and cash equivalents, end of period	34,852	64,533	77,312
Cash paid for:
Interest	34,712	18,884	24,560
Income taxes	6,949	3,257	3,095
Supplemental schedule of non-cash investing and financing activities:
Accrued purchases of property and equipment	607	1,422	815
Acquisition-related contingent consideration	0	691	0
Settlement of Dow liabilities not resulting from a cash payment	$ 0	$ 55,089	$ 0