Consolidated Statements of Redeemable Preferred Stock and Equity Statement - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Common Stock- Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interest
Beginning Balance at Dec. 31, 2012	$ 324,764	$ 83,043	$ 3	$ 274,136	$ 53,823		$ (3,198)
Beginning Balance (in shares) at Dec. 31, 2012		2,995,106	30,559,935
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	423			423
Issuance of common stock (in shares)			58,501
Conversion of Series B Preferred Stock to common stock	79,844	$ (79,080)	$ 1	79,843
Conversion of Series B Preferred Stock to common stock (in shares)		2,851,793	5,763,508
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	$ (688)						(688)
Treasury stock activity (in shares)	(67,913,000)
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)			124,277
Stock compensation expense	$ 5,416			5,416
Net change in unrealized losses on marketable securities	0
Series B Preferred Stock dividends paid	(2,055)				(2,055)
Net loss	186,366				186,366
Ending Balance at Dec. 31, 2013	594,070	$ 3,963	$ 4	359,818	238,134		(3,886)
Ending Balance (in shares) at Dec. 31, 2013		143,313	36,506,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	582			582
Issuance of common stock (in shares)			49,662
Conversion of Series B Preferred Stock to common stock	23	$ (23)		23
Conversion of Series B Preferred Stock to common stock (in shares)		816	1,634
Preferred stock redemption	378	$ (3,940)			378
Preferred stock redemption (in shares)		(142,497)
Issuance of common stock in acquisitions (net of issuance costs)	80,163			80,163
Issuance of common stock in acquisition (in shares)			7,794,710
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	$ (526)						(526)
Treasury stock activity (in shares)	(54,252,000)
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)			70,654
Convertible notes conversion feature (net of taxes of $5,082 and net of issuance cost of $886)	$ 19,068			19,068
Purchase of capped call transactions	(11,904)			(11,904)
Purchase of remaining interest in VIE (net of taxes of $300)	(524)			(524)
Acquisition of noncontrolling interest	8,962							$ 8,962
Stock compensation expense	5,883			5,883
Net change in unrealized losses on marketable securities	(11)					$ (11)
Series B Preferred Stock dividends paid	(40)				(40)
Net loss	82,538				82,611			(73)
Ending Balance at Dec. 31, 2014	778,662		$ 4	453,109	321,083	(11)	(4,412)	8,889
Ending Balance (in shares) at Dec. 31, 2014			44,422,881
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	412			412
Issuance of common stock (in shares)			37,966
Issuance of common stock in acquisitions (net of issuance costs)	15,310			15,310
Issuance of common stock in acquisition (in shares)			1,675,000
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	(854)						(854)
Treasury stock activity	$ (23,473)						(23,473)
Treasury stock activity (in shares)	(92,608,000)		(2,593,222)
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)			295,089
Acquisition of noncontrolling interest	$ (4,828)							(4,828)
Stock compensation expense	5,161			5,161
Net change in unrealized losses on marketable securities	0
Comprehensive income items	(5,011)					(3,998)		(1,013)
Net loss	(151,710)				(151,392)			(318)
Other	341			375	(11)		(23)
Ending Balance at Dec. 31, 2015	$ 614,010		$ 4	$ 474,367	$ 169,680	$ (4,009)	$ (28,762)	$ 2,730
Ending Balance (in shares) at Dec. 31, 2015			43,837,714