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Fair Value of Financial Instruments - Fair Value Roll Forward (Details) - Interest Rate Lock Commitments - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance $ 1,283 $ 913 $ 582 $ 521
Included in net income 441 (290) 1,142 102
Ending balance $ 1,724 $ 623 $ 1,724 $ 623