Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Premiums written—insurance:
Net premiums earned—insurance	$ 237,437	$ 203,646	$ 462,032	$ 402,408
Services revenue	43,503	0	74,133	0
Net investment income	19,285	16,663	36,613	31,981
Net gains on investments and other financial instruments	28,448	25,332	45,227	68,300
Other income	1,743	1,739	3,074	2,865
Total revenues	330,416	247,380	621,079	505,554
Expenses:
Provision for losses	32,560	64,648	77,588	114,274
Policy acquisition costs	6,963	6,746	14,713	13,763
Direct cost of services	23,520	0	42,773	0
Other operating expenses	67,731	60,751	121,505	115,258
Interest expense	24,501	22,348	48,886	42,275
Loss on extinguishment of debt (See Note 10)	91,876	0	91,876	0
Amortization and impairment of intangible assets	3,281	0	6,304	0
Total expenses	250,432	154,493	403,645	285,570
Pretax income from continuing operations	79,984	92,887	217,434	219,984
Income tax provision (benefit)	34,791	(10,650)	80,514	(29,533)
Net income from continuing operations	45,193	103,537	136,920	249,517
Income from discontinued operations, net of tax	4,855	71,296	5,385	128,075
Net income	$ 50,048	$ 174,833	$ 142,305	$ 377,592
Earnings Per Share, Basic [Abstract]
Net income from continuing operations	$ 0.23	$ 0.57	$ 0.71	$ 1.40
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.03	0.39	0.03	0.72
Basic net income per share	0.26	0.96	0.74	2.12
Earnings Per Share, Diluted [Abstract]
Income (Loss) from Continuing Operations, Per Diluted Share	0.20	0.47	0.59	1.15
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0.02	0.31	0.02	0.56
Diluted net income per share	$ 0.22	$ 0.78	$ 0.61	$ 1.71
Weighted-average number of common shares outstanding—basic	193,112	182,583	192,245	177,903
Weighted-average number of common and common equivalent shares outstanding—diluted	246,650	230,779	244,981	226,767
Dividends per share	$ 0.0025	$ 0.0025	$ 0.0050	$ 0.0050