Mortgage Servicing Rights, net Data and Assumptions for Fair Value Calculation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Servicing Assets And Servicing Liabilities At Fair Value, Assumptions Used To Estimate Fair Value, Unpaid Principal Balance	$ 360,956	$ 356,334
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	9.60%	7.50%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	10.00%	10.00%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Coupon Interest Rate	3.90%	3.90%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Life	22 years 4 months 0 days	22 years 11 months 0 days
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Servicing Fee	0.25%	0.25%