Changes and Reclassifications Out of Accumulated Other Comprehensive Income Tax Effect of Changes and Reclassifications Out of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Tax Effect of Changes and Reclassifications Out of Accumulated Other Comprehensive Income [Abstract]
Realized AFS Gross Realized Gain (Loss)	$ (2,793)	$ 2,802
Tax expense (benefit) (35%)	(978)	(981)
Reclassified amount, net of tax	$ 1,815	$ 1,821