Fair Value Measurements Notional Amount of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Notional Disclosures [Abstract]
Best efforts contracts and related committed IRLCs	$ 3,072	$ 2,494
Uncommitted IRLCs	28,028	49,710
FMBSs related to uncommitted IRLCs	41,000	48,000
Best efforts contracts and related mortgage loans held for sale	61,233	63,386
FMBSs related to mortgage loans held for sale	27,000	20,000
Mortgage loans held for sale covered by FMBSs	$ 26,825	$ 19,884

Best Effort Contracts and Related Mortgage Loans Held for Sale

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Forward Sales of Mortgage-Backed Securities Related to Mortgage Loans Held for Sale

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Forward Sales of Mortgage-Backed Securities related to Uncommitted Interest Rate Lock Commitments

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Mortgage Loans Held for Sale Covered by Forward Sales of Mortgage-Backed Securities

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Notional Amount of Best Effort Contracts and Related Committed Interest Rate Lock Commitments

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Notional Amount of Uncommitted Interest Rate Lock Commitments

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