Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Demand deposits	$ 2,866,853	$ 2,576,283
Savings deposits	1,560,752	1,518,722
Certificates and other time deposits of $100,000 or more	276,274	323,698
Other certificates and time deposits	471,247	556,476
Brokered deposits	381,372	314,468
Total Deposits	5,556,498	5,289,647
Cash amount that exceeded federally insured limits	$ 2,200,000	$ 2,100,000