Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities
Net income (loss)	$ 966	$ (18,825)	$ 53,820
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	10,582	18,769	18,542
Provision for doubtful accounts	4,078	6,062	1,372
Stock-based compensation	5,414	8,993	7,543
Deferred income taxes	71	(545)	(22,996)
Amortization of deferred financing costs and debt discount	293	512	682
Asset impairment charge	0	23,378	0
Equity in net loss (gain) of investees	29,685	6,072	(12,054)
Gain on sale of equity investment	0	0	(12,377)
Loss on sale of business	0	53,692	0
Gain on remeasurement of cost method investment	0	(6,577)	0
Deferred income taxes and income taxes receivable on sale of business	0	(51,861)	0
Other non-cash (credits) charges	0	(353)	296
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable and other receivables	(29,928)	(30,997)	5,715
Prepaid expenses and other	631	14,253	15,457
Self-funded insurance programs	809	(2,743)	(5,731)
Accounts payable and accrued expenses	(4,144)	(21,799)	(9,064)
Income taxes on gain from sale of business	30,822	0	0
Accrued transportation costs	2,175	1,301	11,232
Deferred revenue	(1,298)	(1,975)	(4,691)
Other long-term liabilities	4,550	1,634	(629)
Net cash provided by operating activities	60,940	7,899	55,044
Investing activities
Purchase of property and equipment	(10,858)	(17,521)	(19,923)
Proceeds from sale of equity investment	0	0	15,593
Acquisitions, net of cash acquired	0	(43,711)	0
Dispositions or sale of business, net of cash sold	0	12,780	0
Cost method investments	0	0	(3,000)
Proceeds from note receivable	0	3,130	0
Other investing activities	0	0	310
Net cash used in investing activities	(10,858)	(45,322)	(7,020)
Financing activities
Preferred stock dividends	(4,403)	(4,413)	(4,418)
Repurchase of common stock, for treasury	(6,797)	(56,088)	(29,364)
Proceeds from common stock issued pursuant to stock option exercise	11,142	12,413	1,921
Proceeds from debt	12,000	42,000	0
Repayment of debt	(12,000)	(42,000)	0
Other financing activities	(718)	(3,467)	(1,927)
Net cash used in financing activities	(776)	(51,555)	(33,788)
Effect of exchange rate changes on cash	0	(261)	978
Net change in cash, cash equivalents and restricted cash	49,306	(89,239)	15,214
Cash, cash equivalents and restricted cash at beginning of period	12,367	101,606	86,392
Cash, cash equivalents and restricted cash at end of period	61,673	12,367	101,606
Supplemental cash flow information
Cash included in current assets of discontinued operations held for sale	155	2,321	42,512
Cash paid for interest	1,261	1,162	987
Cash (received) paid for income taxes	(30,037)	12,054	18,128
Proceeds receivable from option exercise	0	0	562
Purchases of equipment in accounts payable and accrued liabilities	0	0	1,362
Purchase of equipment through capital lease obligation	0	724	1,474
Acquisitions:
Purchase price	0	54,700	0
Less:
Cash acquired	0	(1,302)	0
Cash acquired	0	(110)	0
Value of existing ownership in Circulation	0	(9,577)	0
Acquisitions, net of cash acquired	0	43,711	0
Other Depreciation and Amortization	$ 6,234	$ 8,908	$ 7,927