CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash provided (required) by operating activities:
Net income (loss)	$ (633,455)	$ 19,938
Adjustments to reconcile net income to net cash provided (required) by operating activities:
Depreciation	16,970	17,071
Amortization	12,862	12,844
Stock-based compensation	2,429	2,285
Loss (gain) on sale of fixed assets	(386)	12
Loss on goodwill and long-lived asset impairment	657,251	1,746
Provision for losses on accounts receivable	2,427	(117)
Amortization of deferred loan costs and accretion of discount	708	648
Deferred income taxes	(28,417)	(5,856)
Employee benefit plan expense	383	770
Other	349	109
Changes in operating assets and liabilities (net of effects of foreign exchange):
Receivables	(6,740)	(7,260)
Inventories	6,587	664
Prepaid expenses and other current assets	4,129	4,096
Accounts payable	3,068	(8,160)
Accrued compensation and employee benefits	(9,799)	(10,584)
Accrued expenses and other liabilities	12,153	11,576
Leased assets	(7,972)	(20,501)
Other	(3,325)	629
Net cash provided by operating activities	29,222	19,910
Cash provided (required) by investing activities:
Capital expenditures	(7,467)	(9,718)
Proceeds from sale of fixed assets	721	2,475
Net cash required by investing activities	(6,746)	(7,243)
Cash provided (required) by financing activities:
Payment of debt issue costs	(1,284)	0
Repayment of long-term debt	0	(25,000)
Payment of finance lease obligations	(1,492)	(1,234)
Payments related to taxes withheld on stock-based compensation	(368)	0
Net cash required by financing activities	(3,144)	(26,234)
Effect of exchange rate changes on cash and cash equivalents	(986)	89
Net increase (decrease) in cash and cash equivalents	18,346	(13,478)
Cash and cash equivalents at beginning of period	35,290	41,832
Cash and cash equivalents at end of period	$ 53,636	$ 28,354