Derivative Financial Instruments (Change in Unrealized Appreciation/Depreciation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	$ (249)	$ 1,640
Credit Default Swap
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	8	(1,582)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	52
Credit derivatives
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	(309)	3,222
Credit risk
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	60	(1,582)
Credit risk | Credit Default Swap
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	8	(1,582)
Credit risk | Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	52
Credit risk | Credit derivatives
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	0	0
Interest rate risk
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	(309)	3,222
Interest rate risk | Credit Default Swap
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	0	0
Interest rate risk | Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	0
Interest rate risk | Credit derivatives
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	$ (309)	$ 3,222