Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ 11,005		$ (29,819)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,297)	$ (12,336)	(12,504)	$ (12,687)	$ (12,755)	$ (12,824)
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)	22,459	$ 10,747	$ (18,222)	$ (10,659)	$ 8,198	$ (713)
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)