Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
Demand deposits	$ 2,576,283	$ 2,146,492
Savings deposits	1,518,722	1,376,707
Certificates and other time deposits of $100,000 or more	323,698	260,685
Other certificates and time deposits	556,476	523,010
Brokered deposits	314,468	333,800
Total Deposits	$ 5,289,647	$ 4,640,694