Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income and (Loss), Before Tax	$ 2,463		$ 150
Change in net unrealized gain on investments	2,327	369
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	14	(12)
Deferred Tax Liabilities, Other Comprehensive Income			(58)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	899
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	5
Accumulated Other Comprehensive Income (Loss), Tax (Expense) Benefit	952
Accumulated other comprehensive income	1,511		92
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	1,428
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ (9)