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Loans and Allowance for Loan and Lease Losses - Additional Information (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($) loan	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Net deferred origination and factoring fees	$ 2,070,000	$ 2,070,000		$ 1,218,000
Pledged loans	470,565,000	470,565,000		280,289,000
Loans transferred to loans held for sale	14,394,000	18,513,000	$ 0
Loans transferred to loans held for sale at fair value	14,642,000	18,680,000
Gain on transfer of loans to loans held for sale		167,000
Recorded investments in troubled debt restructurings	16,055,000	$ 16,055,000		1,383,000
Number of defaults on modified loans | loan		0
Factored receivables
Accounts Notes And Loans Receivable [Line Items]
Customer reserves	22,629,000	$ 22,629,000		$ 21,188,000
Other non interest income
Accounts Notes And Loans Receivable [Line Items]
Gain on transfer of loans to loans held for sale	$ 248,000	$ 167,000

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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