Deposits - Schedule of Deposit Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
One year or less	$ 1,216,491	$ 1,107,667
After one year to two years	464,718	326,800
After two years to three years	160,181	230,468
After three years to four years	9,502	24,939
After four years	13,945	10,442
Total term certificate accounts	$ 1,864,837	$ 1,700,316