Premises, Furniture, and Equipment (Details) - Operating Leases $ in Thousands	Mar. 31, 2017 USD ($)
Property, Plant and Equipment [Abstract]
One year or less	$ 18,809
After one year to two years	16,591
After two years to three years	16,800
After three years to four years	16,276
After four years to five years	16,190
After five years	124,340
Total minimum lease payments	$ 209,006