Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Net premiums earned—insurance	$ 227,433	$ 217,827	$ 689,465	$ 620,235
Services revenue	42,189	42,243	116,322	42,243
Net investment income	22,091	17,143	58,704	49,124
Net gains (losses) on investments and other financial instruments	3,868	(6,294)	49,095	62,006
Other income	1,711	1,162	4,785	4,027
Total revenues	297,292	272,081	918,371	777,635
Expenses:
Provision for losses	64,192	48,942	141,780	163,216
Policy acquisition costs	2,880	4,240	17,593	18,003
Direct cost of services	24,949	23,896	67,722	23,896
Other operating expenses	65,082	51,225	186,587	166,483
Interest expense	21,220	23,989	70,106	66,264
Loss on extinguishment of debt (See Note 10)	11	0	91,887	0
Amortization and impairment of intangible assets	3,273	3,294	9,577	3,294
Total expenses	181,607	155,586	585,252	441,156
Pretax income from continuing operations	115,685	116,495	333,119	336,479
Income tax provision (benefit)	45,594	(15,536)	126,108	(45,069)
Net income from continuing operations	70,091	132,031	207,011	381,548
Income from discontinued operations, net of tax	0	21,559	5,385	149,634
Net income	$ 70,091	$ 153,590	$ 212,396	$ 531,182
Earnings Per Share, Basic [Abstract]
Net income from continuing operations, per diluted share	$ 0.34	$ 0.69	$ 1.05	$ 2.09
Income from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.00	0.11	0.03	0.82
Basic net income per share	0.34	0.80	1.08	2.91
Earnings Per Share, Diluted [Abstract]
Income from Continuing Operations, Per Diluted Share	0.29	0.58	0.88	1.73
Income from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0.00	0.09	0.02	0.64
Diluted net income per share	$ 0.29	$ 0.67	$ 0.90	$ 2.37
Weighted-average number of common shares outstanding—basic	207,938	191,050	197,562	182,357
Weighted-average number of common and common equivalent shares outstanding—diluted	250,795	238,067	246,993	230,662
Dividends per share	$ 0.0025	$ 0.0025	$ 0.0075	$ 0.0075