Fair Value Measurements Notional Amount of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Notional Disclosures [Abstract]
Best efforts contracts and related committed IRLCs	$ 2,625	$ 3,072
Uncommitted IRLCs	46,339	28,028
FMBSs related to uncommitted IRLCs	46,000	41,000
Best efforts contracts and related mortgage loans held for sale	100,152	61,233
FMBSs related to mortgage loans held for sale	27,000	27,000
Mortgage loans held for sale covered by FMBSs	$ 26,690	$ 26,825