Premises, Furniture, and Equipment (Details) - Premises, Furniture, and Equipment - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Land	$ 18,304	$ 43,442
Premises	94,369	152,444
Furniture and equipment	105,859	90,672
Total cost	218,532	286,558
Accumulated depreciation	(140,030)	(171,708)
Net book value of premises, furniture, and equipment	78,502	114,850
Assets held-for-sale	4,075	7,428
Premises, furniture, and equipment, net	$ 82,577	$ 122,278