Other Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Noninterest Income [Abstract]
Income from bank-owned life insurance	$ 3,097	$ 4,097	$ 8,632	$ 11,148
Credit related fees	2,521	2,685	8,297	7,309
Derivative income	1,339	1,347	4,484	1,741
Net gain on sale of assets	400	991	4,465	4,557
Safety deposit box income	424	424	1,264	1,315
Other miscellaneous	3,371	2,322	9,759	6,698
Total other noninterest income	$ 11,152	$ 11,866	$ 36,901	$ 32,768