Basis of Presentation (Details) Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax
Net unrealized appreciation on available-for-sale investments	$ 5,575	$ 4,681
Foreign currency translation	(5,534)	(5,640)
Accumulated other comprehensive income (loss)	41	(959)
Deferred income tax liability	211
Deferred income tax asset		$ 516