Condensed Consolidated Statements of Comprehensive Income Consolidated Statements of Comprehensive Income Paranthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Available-for-sale Securities [Abstract]
Net Unrealized Gains, Tax Impact	$ 2,182	$ (848)	$ 2,310	$ (660)
Reclassification Adjustments, Tax Impact	(38)	1,396	(79)	849
Cash Flow Hedges [Abstract]
Net Unrealized Losses, Tax Impact	6,083	3,180	2,504	460
Reclassification Adjustments, Tax Impact	$ (358)	$ (1,760)	$ (610)	$ (3,156)