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Loans Receivable - Categories (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	$ 809,452		$ 727,227
Deferred loan origination costs and premiums and discounts on purchased loans	4,791		5,199
Total loans receivable	814,243		732,426
Allowance for loan losses	(7,073)	$ (6,378)	(5,800)	$ (5,140)	$ (5,388)	$ (5,426)
Net loans receivable	807,170		726,626
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	89,316		77,232
Allowance for loan losses	(1,201)	(1,010)	(920)	(735)	(871)	(819)
Owner-occupied commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	39,405		34,295
Allowance for loan losses	(439)	(391)	(345)	(271)	(305)	(290)
Investor commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	20,163		22,069
Allowance for loan losses	(261)	(218)	(261)	(205)	(231)	(219)
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	20,155		24,883
Allowance for loan losses	(227)	(359)	(330)	(259)	(292)	(277)
Single tenant lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	279,891		192,608
Allowance for loan losses	(3,093)	(2,452)	(2,061)	(1,660)	(1,868)	(1,731)
Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	448,930		351,087
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	207,703		220,612
Allowance for loan losses	(933)	(988)	(985)	(990)	(859)	(1,008)
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	49,662		58,434
Allowance for loan losses	(157)	(203)	(207)	(213)	(185)	(211)
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	103,157		97,094
Allowance for loan losses	(762)	$ (757)	(691)	$ (807)	$ (777)	$ (871)
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	$ 360,522		$ 376,140

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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