CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities
Net (loss) income	$ (4,978)	$ (181,546)	$ 6,631
Adjustments to reconcile net loss to net cash provided by operating activities:
Provision for bad debts	1,618	689	295
Depreciation and amortization	3,366	4,788	4,765
Stock-based compensation	3,842	5,911	6,404
Impairment of available-for-sale securities			4,375
Amortization of deferred financing costs	4,481	3,862	3,111
Loss on debt extinguishment	148
Impairment charges	17,899	340,628
Income from equity method investment	(61)	(22)	(9)
Loss on disposal of property and equipment	131	2	447
Realized loss on sale of available-for-sale securities		1,916
Loss on sale of assets	7,117
Deferred income taxes	(1,260)	(132,669)	9,581
Changes in operating assets and liabilities:
Accounts receivable	(1,383)	(7,596)	(11,464)
Prepaid expenses and other assets	(7,994)	(6,350)	2,347
Accounts payable and accrued expenses	5,808	59	(5,132)
Deferred revenue	(4,415)	(3,336)	22,126
Other liabilities	8,581	1,874	125
Cash Provided By Operating Activities From Continuing Operations	32,900	28,210	43,602
Cash Used In Operating Activities From Discontinued Operations			(564)
Cash Provided By Operating Activities	32,900	28,210	43,038
Cash Flows From Investing Activities
Cash paid for acquisitions, net of cash acquired			(146,883)
Cash paid for equity method investment			(704)
Investments in intangible assets, including registration and renewal costs	(295)	(335)	(500)
Proceeds from sale of available-for-sale securities		5,757
Purchases of property and equipment	(4,233)	(3,061)	(3,325)
Proceeds from sale of property and equipment		2	45
Proceeds from sale of trademark	4,356	500
Cash Provided By (Used in) Investing Activities	(172)	2,863	(151,367)
Cash Flows From Financing Activities
Proceeds from long-term debt	107,607	10,000	132,000
Stock registration costs		(20)
Payment of long-term debt	(117,456)	(28,300)	(19,000)
Purchase of interest rate caps			(1,248)
Guaranteed payments in connection with acquisitions	(3,475)	(4,375)	(3,750)
Deferred financing costs	(14,590)		(13,141)
Repurchases of common stock	(2,427)	(1,161)	(638)
Noncontrolling interest distributions	(6,682)	(7,438)	(6,800)
Cash (Used in) Provided By Financing Activities	(37,023)	(31,294)	87,423
Net Decrease In Cash and Restricted Cash	(4,295)	(221)	(20,906)
Balance — Beginning of year	20,433	20,654	41,560
Balance — End of year	16,138	20,433	20,654
Supplemental Disclosures Of Cash Flow Information
Cash paid for: Interest	58,681	55,755	45,308
Cash paid for: Taxes	90	163	178
Non-cash Investing And Financing Activities
Accrued purchases of property and equipment at year end	18	152	10
Unrealized (loss) gain on available-for-sale securities during the year			2,062
Unrealized (loss) gain on interest rate cap, net during the year	(80)	$ 224	$ (144)
Unrealize loss on interest rate swaps, net during the year	$ (1,554)