Commitments and Contingencies - Narrative (Details)		12 Months Ended
	Dec. 01, 2014 USD ($)	Dec. 31, 2015 USD ($) loan	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Rental expense under leases for equipment and premises		$ 2,800,000	$ 1,300,000	$ 667,000
Rental income under leases		$ 447,000	260,000	108,000
Limit on stop-loss insurance		1 year
Stop-loss insurance limit per covered individual per year		$ 140,000
Loss Contingencies [Line Items]
Change in fair value of RML earn-out liability		$ 4,094,000	0	$ 0
Loans repurchased in 2 year interval | loan		4
Reserve for unfunded loan commitments and letters of credit		$ 114,000	112,000
Expenditure commitments due in 12 months		606,000
RML
Loss Contingencies [Line Items]
Contingent consideration term	5 years
Liability for future earn out payments	$ 7,318,000	6,600,000	$ 7,300,000
Change in fair value of RML earn-out liability		4,100,000
Loss Contingency Accrual, Payments		$ 4,900,000