Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities
Net income	$ 21,217	$ 27,225
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation, amortization and accretion	9,840	10,544
Amortization of debt related costs	809	959
Loss on extinguishment of debt	3,196	0
Provision for bad debt	107	288
Provision for excess and obsolete inventory	1,699	2,470
Stock-based compensation	9,501	6,419
Deferred taxes	3,790	7,220
Long-term income tax receivable	(842)	(2,220)
Long-term income tax payable and other long-term liabilities	1,113	2,397
Other	229	1,001
Increases (decreases) in cash from operating assets and liabilities:
Accounts receivable	3,078	(7,205)
Inventory	728	(9,832)
Other current assets	(196)	(49)
Accounts payable	1,454	2,200
Accrued expenses and other liabilities	2,240	2,470
Net cash provided by operating activities	57,963	43,887
Investing activities
Capital expenditures	(17,320)	(12,766)
Proceeds from sales of assets	0	1,000
Net cash used in investing activities	(17,320)	(11,766)
Financing activities
Proceeds from issuance of long-term debt	199,461	0
Payments on long-term debt and other borrowings	(272,821)	(2,146)
Deferred financing costs	(2,034)	0
Proceeds from stock option exercises	1,173	1,152
Proceeds from issuance of common stock	573	428
Payments for minimum statutory tax withholding related to net share settlement of equity awards	(2,410)	(3,168)
Net cash used in financing activities	(76,058)	(3,734)
Effect of foreign exchange rates on cash and cash equivalents	76	(93)
Net (decrease) increase in cash and cash equivalents	(35,339)	28,294
Cash and cash equivalents, beginning of period	113,401	76,290
Cash and cash equivalents, end of period	$ 78,062	$ 104,584