Accumulated Other Comprehensive Income Roll Forward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) Roll Forward [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 9,388	$ 6,056	$ 1,811
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(16,515)	(1,821)	(1,899)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(7,127)	4,235	(88)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	3,332	4,245	1,954
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(14,694)	(10)
Other Comprehensive Income Loss Arising During Period Total Net of Tax	(11,348)	4,226
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(14)	9
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	88
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	(14)	97
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	3,346	4,236
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(14,694)	78	1,435
Other Comprehensive Income (Loss), Net of Tax	$ (11,362)	$ 4,323	$ 3,389