Fair Value Measurements Notional Amount of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Notional Disclosures [Abstract]
Best efforts contracts and related committed IRLCs	$ 3,104	$ 2,494
Uncommitted IRLCs	58,687	49,710
FMBSs related to uncommitted IRLCs	64,000	48,000
Best efforts contracts and related mortgage loans held for sale	36,072	63,386
FMBSs related to mortgage loans held for sale	19,000	20,000
Mortgage loans held for sale covered by FMBSs	$ 18,737	$ 19,884