Fair Value Measurement (Summary of Change in Fair Value Carrying Amount of Residential Mortgages ) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale	$ 3,962	$ 5,472	$ 5,432
Aggregate Fair Value
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale		5,472	5,432
Contractual Balance
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale	3,836	5,320	5,285
Fair Value, Option, Loans Held as Assets, Aggregate Difference	$ 126	$ 152	$ 147