Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net revenue	$ 507,434,000	$ 515,995,000	$ 441,222,000
Operating costs and expenses:
Direct operating expenses, excluding depreciation, amortization and stock-based compensation	384,412,000	383,994,000	317,789,000
Depreciation and amortization	25,683,000	23,971,000	17,577,000
Corporate expenses	25,828,000	25,370,000	25,458,000
Stock-based compensation	748,000	4,253,000	4,278,000
Transaction costs	1,175,000	844,000	1,739,000
Business realignment costs	6,204,000	0	0
Goodwill and other intangible impairment charges	51,848,000	0	1,680,000
Net (gain) loss on sale and retirement of assets	397,000	282,000	(12,029,000)
Total operating costs and expenses	496,295,000	438,714,000	356,492,000
Operating income	11,139,000	77,281,000	84,730,000
Other expense (income):
Interest expense, net	32,753,000	34,072,000	35,979,000
Impairment on investment	0	4,236,000	0
Cancellation and (repurchase) of debt	0	(546,000)	30,305,000
Other expense (income), net	288,000	(665,000)	276,000
Income (loss) from continuing operations before income taxes	(21,902,000)	40,184,000	18,170,000
Provision (benefit) from income taxes	(13,027,000)	16,982,000	7,924,000
Net income (loss) from continuing operations	(8,875,000)	23,202,000	10,246,000
Net income (loss) from discontinued operations, net of income taxes	(1,398,000)	91,000	0
Net income (loss)	(10,273,000)	23,293,000	10,246,000
Net income (loss) attributable to:
Controlling interests	(11,185,000)	23,059,000	9,830,000
Noncontrolling interests	$ 912,000	$ 234,000	$ 416,000
Earnings Per Share, Basic [Abstract]
Continuing operations (in usd per share)	$ (0.48)	$ 1.28	$ 0.58
Discontinued operations (in dollars per share)	(0.08)	0	0
Basic (in dollars per share)	(0.56)	1.28	0.58
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)	(0.48)	0.85	0.37
Discontinued operations (in dollars per share)	(0.08)	0	0
Diluted (in dollars per share)	$ (0.56)	$ 0.85	$ 0.37
Weighted average shares outstanding, actual:
Basic (in shares)	18,459	18,255	17,537
Diluted (in shares)	18,459	27,313	27,724