Stockholders' Equity and EPS Reclassifications out of AOCI (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Reclassifications out of AOCI [Abstract]
Reclassification adjustment for losses (gains) included in net income	$ (775)	$ (4,567)	$ (730)	$ (3,693)
Related tax expense (benefit)	296	1,819	278	1,462
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	$ (479)	$ (2,748)	$ (452)	$ (2,231)