Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities
Net income (loss)	$ 33,779	$ 18,595
Income (loss) from discontinued operations, net of income taxes	0	127
Income (loss) from continuing operations	33,779	18,468
Adjustments to reconcile income (loss) from continuing operations to net cash provided by (used for) operating activities
Depreciation	10,400	11,505
Amortization	5,507	6,183
Non-cash stock-based compensation expense	2,763	3,348
Gain on disposal of fixed assets	(7)	(87)
Gain on sale of notes receivable	(11,924)	0
Impairment charges	0	916
Other	844	441
Payments on long-term performance based compensation	0	(413)
Other long-term liabilities	1,538	3,388
Cash flows provided by (used for) working capital
Accounts receivable	(14,266)	9,775
Inventories	(3,939)	2,386
Prepaid expenses and other current assets	(1,728)	(877)
Accounts payable and accrued expenses	8,367	(15,541)
Net cash provided by (used for) operating activities - continuing operations	31,334	39,492
Net cash provided by (used for) operating activities - discontinued operations	0	7,297
Net cash provided by (used for) operating activities	31,334	46,789
Cash Flows From Investing Activities
Capital expenditures	(8,955)	(5,669)
Acquisition of business	(716)	(18,000)
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	(8,471)	(16,155)
Net cash provided by (used for) investing activities - discontinued operations	0	0
Net cash provided by (used for) investing activities	(8,471)	(16,155)
Cash Flows From Financing Activities
Cash dividends paid	(14,570)	(14,524)
Proceeds from issuance of common stock	367	755
Shares withheld for employee taxes on equity awards	(416)	(985)
Net cash provided by (used for) financing activities - continuing operations	(14,619)	(14,754)
Net cash provided by (used for) financing activities - discontinued operations	0	0
Net cash provided by (used for) financing activities	(14,619)	(14,754)
Foreign exchange rate effect on cash	(25)	40
Net increase in cash	8,219	15,920
Cash at January 1	75,527	58,894
Cash at September 30	$ 83,746	$ 74,814