Condensed Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance, beginning of period at Dec. 31, 2010		$ 728	$ 1,010,635	$ 194,225	$ 150,940
Paid-in capital:
Share-based compensation			23,410
Net issuance of common stock		11	(11)
Repurchases of common stock		(2)	(4,108)
Net capital contributed by (to) Citi			(3,662)
Retained earnings:
Net income	119,989			119,989
Dividends				(5,301)
Accumulated other comprehensive income (loss):
Change in foreign currency translation adjustment, net of income tax (benefit) expense					(7,911)
Change in net unrealized investment gains (losses) during the period, net of income taxes:
Change in net unrealized investment gains (losses) not other-than-temporarily impaired, net of income tax expense (benefit)					935
Change in net unrealized investment gains (losses) other-than-temporarily impaired, net of income tax (benefit) expense					(88)
Balance, ending of period at Sep. 30, 2011	1,479,790	737	1,026,264	308,913	143,876
Balance, beginning of period at Dec. 31, 2011	1,326,650	649	835,232	344,104	146,665
Paid-in capital:
Share-based compensation			24,643
Net issuance of common stock		13	(13)
Repurchases of common stock		(65)	(169,938)
Net capital contributed by (to) Citi			1,961
Retained earnings:
Net income	133,535			133,535
Dividends				(9,416)
Accumulated other comprehensive income (loss):
Change in foreign currency translation adjustment, net of income tax (benefit) expense					6,986
Change in net unrealized investment gains (losses) during the period, net of income taxes:
Change in net unrealized investment gains (losses) not other-than-temporarily impaired, net of income tax expense (benefit)					22,754
Change in net unrealized investment gains (losses) other-than-temporarily impaired, net of income tax (benefit) expense					301
Balance, ending of period at Sep. 30, 2012	$ 1,337,411	$ 597	$ 691,885	$ 468,223	$ 176,706