Accumulated Other Comprehensive Loss - Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Reclassifications Out Of Accumulated Other Comprehensive Income [Line Items]
Related income tax expense	$ (5,803)	$ (4,769)
Other comprehensive income, net of tax	776	91
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassifications Out Of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	(83)	(84)
Related income tax expense	31	31
Other comprehensive income, net of tax	$ (52)	$ (53)