Fair Value Measurements - Recurring (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets:
Securities available-for-sale	$ 385,486us-gaap_AvailableForSaleSecurities	$ 372,191us-gaap_AvailableForSaleSecurities
Mortgage servicing rights	5,462us-gaap_ServicingAssetAtFairValueAmount	5,807us-gaap_ServicingAssetAtFairValueAmount
U.S. Treasury
Assets:
Securities available-for-sale	1,527	1,544
U.S. government agencies
Assets:
Securities available-for-sale	1,624	1,672
States and political subdivisions
Assets:
Securities available-for-sale	22,018	16,794
Corporate bonds
Assets:
Securities available-for-sale	30,985	15,102
Collateralized mortgage obligations
Assets:
Securities available-for-sale	63,627	63,876
Asset-backed securities
Assets:
Securities available-for-sale	173,496	273,203
Collateralized loan obligations
Assets:
Securities available-for-sale	92,209
Level 1
Assets:
Securities available-for-sale	1,527	1,544
Level 2
Assets:
Securities available-for-sale	330,900	216,385
Loans held-for-sale	5,072	3,822
Level 3
Assets:
Securities available-for-sale	53,059	154,262
Recurring \| Level 1
Assets:
Total financial assets	1,527	1,544
Recurring \| Level 1 \| U.S. Treasury
Assets:
Securities available-for-sale	1,527	1,544
Recurring \| Level 2
Assets:
Loans held-for-sale	5,072	3,822
Total financial assets	336,145	220,751
Liabilities:
Total	30	229
Recurring \| Level 2 \| Interest rate swap agreements net of swap credit valuation
Assets:
Other assets	30	229
Liabilities:
Other liabilities	30	229
Recurring \| Level 2 \| Forward MBS
Assets:
Other assets	143	315
Recurring \| Level 2 \| U.S. government agencies
Assets:
Securities available-for-sale	1,624	1,672
Recurring \| Level 2 \| States and political subdivisions
Assets:
Securities available-for-sale	21,900	16,669
Recurring \| Level 2 \| Corporate bonds
Assets:
Securities available-for-sale	30,985	15,102
Recurring \| Level 2 \| Collateralized mortgage obligations
Assets:
Securities available-for-sale	63,627	63,876
Recurring \| Level 2 \| Asset-backed securities
Assets:
Securities available-for-sale	120,555	119,066
Recurring \| Level 2 \| Collateralized loan obligations
Assets:
Securities available-for-sale	92,209
Recurring \| Level 3
Assets:
Mortgage servicing rights	5,462	5,807
Total financial assets	58,521	160,063
Recurring \| Level 3 \| Interest rate swap agreements net of swap credit valuation
Assets:
Other assets		(6)
Recurring \| Level 3 \| States and political subdivisions
Assets:
Securities available-for-sale	118	125
Recurring \| Level 3 \| Asset-backed securities
Assets:
Securities available-for-sale	52,941	154,137
Recurring \| Total
Assets:
Loans held-for-sale	5,072	3,822
Mortgage servicing rights	5,462	5,807
Total financial assets	396,193	382,358
Liabilities:
Total	30	229
Recurring \| Total \| Interest rate swap agreements net of swap credit valuation
Assets:
Other assets	30	223
Liabilities:
Other liabilities	30	229
Recurring \| Total \| Forward MBS
Assets:
Other assets	143	315
Recurring \| Total \| U.S. Treasury
Assets:
Securities available-for-sale	1,527	1,544
Recurring \| Total \| U.S. government agencies
Assets:
Securities available-for-sale	1,624	1,672
Recurring \| Total \| States and political subdivisions
Assets:
Securities available-for-sale	22,018	16,794
Recurring \| Total \| Corporate bonds
Assets:
Securities available-for-sale	30,985	15,102
Recurring \| Total \| Collateralized mortgage obligations
Assets:
Securities available-for-sale	63,627	63,876
Recurring \| Total \| Asset-backed securities
Assets:
Securities available-for-sale	173,496	273,203
Recurring \| Total \| Collateralized loan obligations
Assets:
Securities available-for-sale	$ 92,209

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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