Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Non-controlling Interest
Beginning balance (in shares) at Dec. 31, 2014		154,327,000
Beginning balance at Dec. 31, 2014	$ 1,472,536	$ 2,033	$ 683,611	$ 545,357	$ (14,210)	$ (4,801)	$ 260,546
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	106,110			79,110			27,000
Foreign currency translation adjustments	(14,039)				(10,462)		(3,577)
Unrealized gain (loss) on marketable securities	(1,186)				(883)		(303)
Equity-based compensation expense	28,600		28,600
Distributions to noncontrolling interest	(43,539)						(43,539)
Common stock dividends	(92,844)			(92,844)
Preferred stock dividends	(2)			(2)
Common shares issued upon vesting of share-based awards (in shares)		1,070,000
Common shares issued upon vesting of share-based awards	0	$ 12	(12)
Common shares issued for ESPP (in shares)		20,000
Common shares issued for ESPP	287		287
Blackhawk acquisition	0
Treasury shares withheld (in shares)		(271,000)
Treasury shares withheld	(4,497)					(4,497)
Ending balance (in shares) at Dec. 31, 2015		155,146,000
Ending balance at Dec. 31, 2015	1,451,426	$ 2,045	712,486	531,621	(25,555)	(9,298)	240,127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(156,079)			(135,338)			(20,741)
Foreign currency translation adjustments	546				165		381
Unrealized gain (loss) on marketable securities	796				616		180
Equity-based compensation expense	15,978		15,978
Distributions to noncontrolling interest	(8,027)						(8,027)
Common stock dividends	(79,012)			(79,012)
Preferred stock dividends	(1)			(1)
Transfer of Mosing Holdings interest to FINV	19,748		239,871		(8,203)		(211,920)
Common shares issued on conversion of Series A preferred stock (in shares)		52,976,000
Common shares issued on conversion of Series A preferred stock	597	$ 597
Common shares issued upon vesting of share-based awards (in shares)		1,644,000
Common shares issued upon vesting of share-based awards	0	$ 19	(19)
TRA and associated deferred taxes	$ (76,409)		(76,409)
Common shares issued for ESPP (in shares)	75,974	76,000
Common shares issued for ESPP	$ 973	$ 1	972
Blackhawk acquisition (in shares)		12,804,000
Blackhawk acquisition	144,047	$ 140	143,907
Treasury shares withheld (in shares)		(245,000)
Treasury shares withheld	(3,264)					(3,264)
Ending balance (in shares) at Dec. 31, 2016		222,401,000
Ending balance at Dec. 31, 2016	1,311,319	$ 2,802	1,036,786	317,270	(32,977)	(12,562)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(159,457)			(159,457)
Foreign currency translation adjustments	2,345				2,345		0
Unrealized gain (loss) on marketable securities	(340)				(340)		0
Equity-based compensation expense	13,825		13,825
Common stock dividends	(50,154)			(50,154)
Common shares issued upon vesting of share-based awards (in shares)		1,017,000
Common shares issued upon vesting of share-based awards	$ 0	$ 11	(11)
Common shares issued for ESPP (in shares)	155,673	50,000
Common shares issued for ESPP	$ 524	$ 1	523			0
Blackhawk acquisition	0
Treasury shares issued upon vesting of share-based awards (in shares)		4,000
Treasury shares issued upon vesting of share-based awards	(18)		(84)			66
Treasury shares issued for ESPP (in shares)		105,000
Treasury shares issued for ESPP	740	$ 0	(166)	(736)		1,642
Treasury shares withheld (in shares)		(288,000)
Treasury shares withheld	(2,883)					(2,883)
Ending balance (in shares) at Dec. 31, 2017		223,289,000
Ending balance at Dec. 31, 2017	$ 1,115,901	$ 2,814	$ 1,050,873	$ 106,923	$ (30,972)	$ (13,737)	$ 0