Fair Value Measurements Fair Value Measurements (Details 2) (Level 3, Private Label CMOs, Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Level 3 CMO Roll Forward [Abstract]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 33,444	$ 33,947
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	154
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(109)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	$ 548
Minimum [Member]
Unobservable Inputs Quantitative Information [Abstract]
Fair Value Inputs, Prepayment Rate	0.00%
Fair Value Inputs, Probability of Default	0.00%
Fair Value Inputs, Loss Severity	0.00%
Fair Value Inputs, Discount Rate	0.00%
Maximum [Member]
Unobservable Inputs Quantitative Information [Abstract]
Fair Value Inputs, Prepayment Rate	34.38%
Fair Value Inputs, Probability of Default	42.67%
Fair Value Inputs, Loss Severity	71.21%
Fair Value Inputs, Discount Rate	22.57%
Weighted Average [Member]
Unobservable Inputs Quantitative Information [Abstract]
Fair Value Inputs, Prepayment Rate	5.70%
Fair Value Inputs, Probability of Default	2.89%
Fair Value Inputs, Loss Severity	30.16%
Fair Value Inputs, Discount Rate	5.58%