Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) before tax at beginning of period				$ (8,058)
Accumulated other comprehensive income (loss), tax effect at beginning of period				0
Accumulated other comprehensive income (loss) at beginning period	(7,644)	(6,953)	(9,245)	(8,058)
Other comprehensive income (loss) before reclassifications	1,286	(1,807)	2,825	(803)
Terminated cash flow hedge		0		0
Amounts reclassified from AOCL	60	1,490	122	1,591
Other comprehensive income (loss)	1,346	(317)	2,947	788
Accumulated other comprehensive income at end of period	(6,298)	(7,270)	(6,298)	(7,270)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net impairment loss recognized in earnings	0	26	0	26
Interest expense	(1,819)	(2,339)	(3,624)	(4,733)
Total reclassifications before tax	7,899	6,899	12,504	12,741
Tax expense (benefit)	1,847	(56,489)	3,314	(56,454)
Net Income (loss)	6,052	63,388	9,190	69,195
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net Income (loss)	(60)	(1,490)	(122)	(1,591)
Unrealized Losses on Available For Sale Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) before tax at beginning of period				(516)
Accumulated other comprehensive income (loss), tax effect at beginning of period				181
Accumulated other comprehensive income (loss) at beginning period	(1,661)	679	(3,200)	(335)
Other comprehensive income (loss) before reclassifications	1,286	(1,786)	2,825	(779)
Terminated cash flow hedge		0		0
Amounts reclassified from AOCL	(1)	5	(1)	12
Other comprehensive income (loss)	1,285	(1,781)	2,824	(767)
Accumulated other comprehensive income at end of period	(376)	(1,102)	(376)	(1,102)
Unrealized Losses on Available For Sale Securities [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net gains on securities	2	15	2	8
Net impairment loss recognized in earnings	0	(26)	0	(26)
Total reclassifications before tax	2	(11)	2	(18)
Tax expense (benefit)	1	(6)	1	(6)
Net Income (loss)	1	(5)	1	(12)
Disproportionate Tax Effects from Securities Available for Sale [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) before tax at beginning of period				(5,617)
Accumulated other comprehensive income (loss), tax effect at beginning of period				(181)
Accumulated other comprehensive income (loss) at beginning period	(5,798)	(5,798)	(5,798)	(5,798)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Terminated cash flow hedge		0		0
Amounts reclassified from AOCL	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Accumulated other comprehensive income at end of period	(5,798)	(5,798)	(5,798)	(5,798)
Unrealized Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) before tax at beginning of period				(739)
Accumulated other comprehensive income (loss), tax effect at beginning of period				258
Accumulated other comprehensive income (loss) at beginning period	0	(390)	0	(481)
Other comprehensive income (loss) before reclassifications	0	(21)	0	(24)
Terminated cash flow hedge		370		370
Amounts reclassified from AOCL	0	41	0	135
Other comprehensive income (loss)	0	20	0	111
Accumulated other comprehensive income at end of period	0	0	0	0
Unrealized Losses on Cash Flow Hedges [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense		(114)		(208)
Tax expense (benefit)		(73)		(73)
Net Income (loss)		(41)		(135)
Unrealized Losses on Settled Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) before tax at beginning of period				0
Accumulated other comprehensive income (loss), tax effect at beginning of period				0
Accumulated other comprehensive income (loss) at beginning period	(185)	0	(247)	0
Other comprehensive income (loss) before reclassifications	0	0	0	0
Terminated cash flow hedge		(370)		(370)
Amounts reclassified from AOCL	61	0	123	0
Other comprehensive income (loss)	61	0	123	0
Accumulated other comprehensive income at end of period	(124)	(370)	(124)	(370)
Unrealized Losses on Settled Derivatives [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(95)		(190)
Tax expense (benefit)	(34)		(67)
Net Income (loss)	(61)		(123)
Disproportionate Tax Effects from Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) before tax at beginning of period				(1,186)
Accumulated other comprehensive income (loss), tax effect at beginning of period				(258)
Accumulated other comprehensive income (loss) at beginning period	0	(1,444)	0	(1,444)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Terminated cash flow hedge		0		0
Amounts reclassified from AOCL	0	1,444	0	1,444
Other comprehensive income (loss)	0	1,444	0	1,444
Accumulated other comprehensive income at end of period	0	0	0	0
Disproportionate Tax Effects from Cash Flow Hedges [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Tax expense (benefit)		$ 1,444		$ 1,444