Equity (Change in Accumulated Other Comprehensive Income by Component) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Unrealized Gain (Loss) on Available-for-Sale Securities
Increase (decrease) in unrealized gains (losses) on securities		$ (13,997)	$ 11,559	$ (5,407)	$ 15,236
Reclassification adjustment of net gains (losses) included in net income (loss)		1	(196)	(533)	(527)
Net current period other comprehensive income (loss)		(8,567)	6,919	(3,659)	8,945
Accumulated Gain (Loss) on Effective Cash Flow Hedges
Increase (decrease) in unrealized gains (losses) on cash flow hedges		(504)	7,741	8,126	11,878
Reclassification adjustment of net gains included in net income		(2,534)	(2,264)	(5,072)	(4,307)
Net current period other comprehensive income (loss)		(1,852)	3,340	1,870	4,617
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period				20,917	9,844
Increase (decrease) in unrealized gains (losses) on securities		(13,997)	11,559	(5,407)	15,236
Tax (expense) benefit on increase in unrealized gains (losses)				(1,080)	(10,622)
Other comprehensive income (loss) before reclassifications				1,639	16,492
Reclassification adjustment of net gains included in net income	[1]			(5,605)	(4,834)
Reclassification adjustment for tax expense on realized net gains	[2]			2,177	1,904
Amounts reclassified from AOCI				(3,428)	(2,930)
Net current period other comprehensive income (loss)				(1,789)	13,562
Balance at end of period		19,128	23,406	19,128	23,406
Unrealized Gain (Loss) on Available-for-Sale Securities [Member]
Unrealized Gain (Loss) on Available-for-Sale Securities
Balance at beginning of period				19,448	12,960
Increase (decrease) in unrealized gains (losses) on securities				(5,407)	15,236
Tax benefit (expense) on increase in unrealized gains (losses)				2,074	(5,972)
Other comprehensive income (loss), before reclassifications				(3,333)	9,264
Reclassification adjustment of net gains (losses) included in net income (loss)	[1]			(533)	(527)
Reclassification adjustment for tax expense (benefit) on realized net gains (losses)	[2]			207	208
Amount reclassified from AOCI				(326)	(319)
Net current period other comprehensive income (loss)				(3,659)	8,945
Balance at end of period		15,789	21,905	15,789	21,905
Accumulated Other Comprehensive Income (Loss)
Increase (decrease) in unrealized gains (losses) on securities				(5,407)	15,236
Accumulated Gain (Loss) on Effective Cash Flow Hedges [Member]
Accumulated Gain (Loss) on Effective Cash Flow Hedges
Accumulated unrealized gain (loss) balance at beginning of period				1,469	(3,116)
Increase (decrease) in unrealized gains (losses) on cash flow hedges				8,126	11,878
Tax benefit (expense) on increase in unrealized gains (losses)				(3,154)	(4,650)
Other comprehensive income (loss) before reclassifications				4,972	7,228
Reclassification adjustment of net gains included in net income	[1]			(5,072)	(4,307)
Reclassification adjustment for tax expense on realized net gains	[2]			1,970	1,696
Amount reclassified from AOCI				(3,102)	(2,611)
Net current period other comprehensive income (loss)				1,870	4,617
Accumulated unrealized gain (loss) balance at end of period		$ 3,339	$ 1,501	$ 3,339	$ 1,501

[1] The amounts reclassified from AOCI for the available-for-sale securities are included in net securities gains on the Consolidated Statements of Income, while the amounts reclassified from AOCI for cash flow hedges are included in interest income on loans on the Consolidated Statements of Income.

[2] The tax expense amounts reclassified from AOCI in connection with the available-for-sale securities reclassification and cash flow hedges reclassification are included in income tax provision on the Consolidated Statements of Income.