Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities
Net income (loss)	$ 25,094	$ 13,376
Income (loss) from discontinued operations, net of income taxes	0	127
Income (loss) from continuing operations	25,094	13,249
Adjustments to reconcile income (loss) from continuing operations to net cash provided by (used for) operating activities
Depreciation	7,243	8,051
Amortization	4,518	4,046
Non-cash stock-based compensation expense	1,346	2,220
Gain on disposal of fixed assets	(7)	(98)
Gain on sale of notes receivable	(11,924)	0
Impairment charges	0	916
Other	407	340
Payments on long-term performance based compensation	0	(413)
Other long-term liabilities	478	3,514
Cash flows provided by (used for) working capital
Accounts receivable	(9,672)	(56)
Inventories	(5,453)	1,450
Prepaid expenses and other current assets	(2,926)	(2,041)
Accounts payable and accrued expenses	2,681	(15,005)
Net cash provided by (used for) operating activities - continuing operations	11,785	16,173
Net cash provided by (used for) operating activities - discontinued operations	0	7,297
Net cash provided by (used for) operating activities	11,785	23,470
Cash Flows From Investing Activities
Capital expenditures	(5,589)	(4,406)
Acquisition of business	(691)	0
Proceeds from sale of property, plant and equipment	0	7,514
Proceeds on sale of notes receivable	1,200	0
Net cash provided by (used for) investing activities - continuing operations	(5,080)	3,108
Net cash provided by (used for) investing activities - discontinued operations	0	0
Net cash provided by (used for) investing activities	(5,080)	3,108
Cash Flows From Financing Activities
Cash dividends paid	(9,736)	(9,733)
Proceeds from issuance of common stock	235	365
Shares withheld for employee taxes on equity awards	(362)	(978)
Net cash provided by (used for) financing activities - continuing operations	(9,863)	(10,346)
Net cash provided by (used for) financing activities - discontinued operations	0	0
Net cash provided by (used for) financing activities	(9,863)	(10,346)
Foreign exchange rate effect on cash	(47)	79
Net (decrease) increase in cash	(3,205)	16,311
Cash at January 1	75,527	58,894
Cash at June 30	$ 72,322	$ 75,205