Other Comprehensive Income (Loss) (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (24,827)	$ (13,716)	$ (41,258)	$ (29,514)	$ (33,060)	$ 4,101
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,893)	(12,962)	(13,099)	(13,168)	(13,237)	(13,373)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member] | Valuation Allowance of Deferred Tax Assets [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,100)
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,866)	(1,686)	(28,936)	(17,168)	(20,689)	17,111
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member] | Valuation Allowance of Deferred Tax Assets [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (13,300)