Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Net premiums earned—insurance	$ 229,096	$ 229,085	$ 450,896	$ 450,035
Services revenue	37,802	40,263	75,829	73,112
Net investment income	30,071	28,839	61,103	56,040
Net gains (losses) on investments and other financial instruments	5,331	30,527	2,480	61,813
Other income	612	1,454	1,358	2,120
Total revenues	302,912	330,168	591,666	643,120
Expenses:
Provision for losses	17,222	49,725	64,135	92,716
Policy acquisition costs	6,123	5,393	12,852	11,782
Cost of services	25,635	27,365	54,010	50,915
Other operating expenses	68,750	63,173	137,127	120,361
Interest expense	16,179	22,546	32,117	44,080
Loss on induced conversion and debt extinguishment (Note 11)	1,247	2,108	5,703	57,678
Impairment of goodwill (Note 6)	184,374	0	184,374	0
Amortization and impairment of other intangible assets	18,856	3,311	22,152	6,639
Total expenses	338,386	173,621	512,470	384,171
Pretax income (loss)	(35,474)	156,547	79,196	258,949
Income tax provision (benefit)	(8,132)	58,435	30,066	94,588
Net income (loss)	$ (27,342)	$ 98,112	$ 49,130	$ 164,361
Earnings Per Share, Basic [Abstract]
Basic net income (loss) per share	$ (0.13)	$ 0.46	$ 0.23	$ 0.79
Earnings Per Share, Diluted [Abstract]
Diluted net income (loss) per share	$ (0.13)	$ 0.44	$ 0.22	$ 0.73
Weighted-average number of common shares outstanding—basic	215,152	214,274	215,054	208,991
Weighted-average number of common and common equivalent shares outstanding—diluted	215,152	226,203	220,474	232,945
Dividends per share	$ 0.0025	$ 0.0025	$ 0.0050	$ 0.0050