Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (6,092)	$ (22,323)	$ (12,605)	$ (24,827)	$ (13,716)	$ (41,258)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,618)	(12,687)	(12,824)	(12,893)	(12,962)	(13,099)
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)	5,561	$ (10,659)	$ (713)	$ (12,866)	$ (1,686)	$ (28,936)
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)