Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Net premiums earned—insurance	$ 229,085	$ 237,437	$ 450,035	$ 462,032
Services revenue	38,294	43,503	69,894	74,133
Net investment income	28,839	19,285	56,040	36,613
Net gains (losses) on investments and other financial instruments	30,527	28,448	61,813	45,227
Other income	3,423	1,743	5,338	3,074
Total revenues	330,168	330,416	643,120	621,079
Expenses:
Provision for losses	49,725	32,560	92,716	77,588
Policy acquisition costs	5,393	6,963	11,782	14,713
Direct cost of services	24,858	23,520	46,607	42,773
Other operating expenses	65,680	67,731	124,669	121,505
Interest expense	22,546	24,501	44,080	48,886
Loss on induced conversion and debt extinguishment (Note 11)	2,108	91,876	57,678	91,876
Amortization and impairment of intangible assets	3,311	3,281	6,639	6,304
Total expenses	173,621	250,432	384,171	403,645
Pretax income from continuing operations	156,547	79,984	258,949	217,434
Income tax provision (benefit)	58,435	34,791	94,588	80,514
Net income from continuing operations	98,112	45,193	164,361	136,920
Income (loss) from discontinued operations, net of tax	0	4,855	0	5,385
Net income	$ 98,112	$ 50,048	$ 164,361	$ 142,305
Earnings Per Share, Basic [Abstract]
Net income from continuing operations, per basic share	$ 0.46	$ 0.23	$ 0.79	$ 0.71
Income from discontinued operations and disposal of discontinued operations, net of tax, per basic share	0.00	0.03	0.00	0.03
Basic net income per share	0.46	0.26	0.79	0.74
Earnings Per Share, Diluted [Abstract]
Net income from continuing operations, per diluted share	0.44	0.20	0.73	0.59
Income from discontinued operations and disposal of discontinued operations, net of tax, per diluted share	0.00	0.02	0.00	0.02
Diluted net income per share	$ 0.44	$ 0.22	$ 0.73	$ 0.61
Weighted-average number of common shares outstanding—basic	214,274	193,112	208,991	192,245
Weighted-average number of common and common equivalent shares outstanding—diluted	226,203	246,650	232,945	244,981
Dividends per share	$ 0.0025	$ 0.0025	$ 0.0050	$ 0.0050