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Fair Value Measurements - Recurring (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets:
Securities available-for-sale	$ 408,836	$ 385,486
Mortgage servicing rights	5,470	5,462
U.S. Treasury
Assets:
Securities available-for-sale	1,515	1,527
U.S. government agencies
Assets:
Securities available-for-sale	1,577	1,624
U.S. government agency mortgage-backed
Assets:
Securities available-for-sale	2,034
States and political subdivisions
Assets:
Securities available-for-sale	23,170	22,018
Corporate bonds
Assets:
Securities available-for-sale	29,580	30,985
Collateralized mortgage obligations
Assets:
Securities available-for-sale	70,877	63,627
Asset-backed securities
Assets:
Securities available-for-sale	187,096	173,496
Collateralized loan obligations
Assets:
Securities available-for-sale	92,987	92,209
Level 1
Assets:
Securities available-for-sale	1,515	1,527
Level 2
Assets:
Securities available-for-sale	407,203	330,900
Loans held-for-sale	3,899	5,072
Level 3
Assets:
Securities available-for-sale	118	53,059
Recurring
Assets:
Loans held-for-sale	3,899	5,072
Mortgage servicing rights	5,470	5,462
Total financial assets	418,592	396,193
Liabilities:
Total	973	30
Recurring | Interest rate swap agreements net of swap credit valuation
Assets:
Other assets	157	30
Liabilities:
Other liabilities	973	30
Recurring | Forward MBS contracts and forward loan contracts
Assets:
Other assets	230	143
Recurring | U.S. Treasury
Assets:
Securities available-for-sale	1,515	1,527
Recurring | U.S. government agencies
Assets:
Securities available-for-sale	1,577	1,624
Recurring | U.S. government agency mortgage-backed
Assets:
Securities available-for-sale	2,034
Recurring | States and political subdivisions
Assets:
Securities available-for-sale	23,170	22,018
Recurring | Corporate bonds
Assets:
Securities available-for-sale	29,580	30,985
Recurring | Collateralized mortgage obligations
Assets:
Securities available-for-sale	70,877	63,627
Recurring | Asset-backed securities
Assets:
Securities available-for-sale	187,096	173,496
Recurring | Collateralized loan obligations
Assets:
Securities available-for-sale	92,987	92,209
Recurring | Level 1
Assets:
Total financial assets	1,515	1,527
Recurring | Level 1 | U.S. Treasury
Assets:
Securities available-for-sale	1,515	1,527
Recurring | Level 2
Assets:
Loans held-for-sale	3,899	5,072
Total financial assets	411,489	336,145
Liabilities:
Total	973	30
Recurring | Level 2 | Interest rate swap agreements net of swap credit valuation
Assets:
Other assets	157	30
Liabilities:
Other liabilities	973	30
Recurring | Level 2 | Forward MBS contracts and forward loan contracts
Assets:
Other assets	230	143
Recurring | Level 2 | U.S. government agencies
Assets:
Securities available-for-sale	1,577	1,624
Recurring | Level 2 | U.S. government agency mortgage-backed
Assets:
Securities available-for-sale	2,034
Recurring | Level 2 | States and political subdivisions
Assets:
Securities available-for-sale	23,052	21,900
Recurring | Level 2 | Corporate bonds
Assets:
Securities available-for-sale	29,580	30,985
Recurring | Level 2 | Collateralized mortgage obligations
Assets:
Securities available-for-sale	70,877	63,627
Recurring | Level 2 | Asset-backed securities
Assets:
Securities available-for-sale	187,096	120,555
Recurring | Level 2 | Collateralized loan obligations
Assets:
Securities available-for-sale	92,987	92,209
Recurring | Level 3
Assets:
Mortgage servicing rights	5,470	5,462
Total financial assets	5,588	58,521
Recurring | Level 3 | States and political subdivisions
Assets:
Securities available-for-sale	$ 118	118
Recurring | Level 3 | Asset-backed securities
Assets:
Securities available-for-sale		$ 52,941

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