CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2011	$ 803,435	$ 1,746	$ 322,133	$ (155,801)	$ 565,109	$ 70,248
Beginning Balance (in shares) at Dec. 31, 2011		17,467,615		3,511,380
Net income	7,904				7,904
Changes in comprehensive income:
Change in net unrealized gain (loss) on investments	8,530					8,530
Change in net non-credit other-than-temporary impairment losses	419					419
Change in foreign currency translation gain (loss)	(2,972)					(2,972)
Comprehensive income (loss)	5,977					5,977
Shares issued under stock plan (in shares)		45,942
Shares issued under stock plan	(311)	4	(315)
Share-based compensation	1,212		1,212
Ending Balance at Mar. 31, 2012	$ 818,217	$ 1,750	$ 323,030	$ (155,801)	$ 573,013	$ 76,225
Ending Balance (in shares) at Mar. 31, 2012		17,513,557		3,511,380