Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 176,293	$ 20,405	$ 25,625
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,411	15,342	15,989
Cost of revenue - television (spectrum usage rights)	12,340
Deferred income taxes	81,963	12,528	15,664
Non-cash interest	3,237	776	797
Amortization of syndication contracts	452	398	360
Payments on syndication contracts	(445)	(388)	(510)
Equity in net (income) loss of nonconsolidated affiliate	310
Non-cash stock-based compensation	6,091	5,035	5,240
(Gain) loss on sale of property	28
(Gain) loss on debt extinguishment	3,306	161	204
Changes in assets and liabilities:
(Increase) decrease in trade receivables	414	1,397	871
(Increase) decrease in prepaid expenses and other current assets	(913)	439	(499)
Increase (decrease) in accounts payable, accrued expenses and other liabilities	2,033	1,203	(1,458)
Net cash provided by operating activities	301,520	57,296	62,283
Cash flows from investing activities:
Proceeds from sale of property and equipment and intangibles	50
Purchases of property and equipment	(12,078)	(9,053)	(13,696)
Purchases of intangibles	(32,588)
Purchase of a businesses, net of cash acquired	(32,968)
Purchases of short term investments: CDs		(30,000)
Proceeds from short term investments: CDs		30,000
Purchases of investments	(2,450)	(500)
Deposits on acquisition	(190)
Net cash used in investing activities	(80,224)	(9,553)	(13,696)
Cash flows from financing activities:
Proceeds from stock option exercises	708	780	2,177
Tax payments related to shares withheld for share-based compensation plans	(798)
Payments on long-term debt	(293,563)	(23,750)	(23,750)
Dividends paid	(14,670)	(11,177)	(9,350)
Repurchase of Class A common stock	(5,330)
Payment of contingent consideration			(1,000)
Termination of swap agreements	(2,441)
Proceeds from borrowings on long-term debt	298,500
Payments of capitalized debt offering and issuance costs	(3,382)
Net cash used in financing activities	(20,976)	(34,147)	(31,923)
Effect of exchange rates on cash, cash equivalents and restricted cash	14
Net increase (decrease) in cash, cash equivalents and restricted cash	200,334	13,596	16,664
Cash, cash equivalents and restricted cash:
Beginning	61,520	47,924	31,260
Ending	261,854	61,520	47,924
Cash payments for:
Interest	13,472	14,693	12,249
Income taxes	846	593	750
Supplemental disclosures of non-cash investing and financing activities:
Capital expenditures financed through accounts payable, accrued expenses and other liabilities	1,678	$ 1,068	$ 813
Contingent consideration included in accounts payable, accrued expenses and other liabilities	$ 15,926