Acquired Loans - Components of the Allowance for Loan Losses on Acquired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning	$ 12,059	$ 9,636	$ 6,075
Provision for loan losses, acquired loans	3,425	6,171	6,039
Loans charged-off	(7,200)	(6,147)	(4,094)
Recoveries	3,708	2,399	1,616
Net (charge-offs) recoveries	(3,492)	(3,748)	(2,478)
Balance, ending	11,992	12,059	9,636
Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning	10,541	7,249	1,885
Provision for loan losses, acquired loans	3,854	7,149	7,367
Loans charged-off	(6,722)	(6,274)	(3,634)
Recoveries	3,586	2,417	1,631
Net (charge-offs) recoveries	(3,136)	(3,857)	(2,003)
Balance, ending	11,259	10,541	7,249
Covered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning	1,518	2,387	4,190
Provision for loan losses, acquired loans	(429)	(978)	(1,328)
Loans charged-off	(478)	127	(460)
Recoveries	122	(18)	(15)
Net (charge-offs) recoveries	(356)	109	(475)
Balance, ending	$ 733	$ 1,518	$ 2,387