Other Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Noninterest Income [Abstract]
Income from bank-owned life insurance	$ 3,113	$ 2,883	$ 6,183	$ 5,535
Credit-related fees	2,416	2,898	5,138	5,776
Income from derivatives	1,588	2,680	3,111	3,145
Gain (loss) on sale of assets	41	(60)	(1,166)	4,065
Amortization of FDIC loss share receivable		(1,327)		(2,427)
Other miscellaneous	3,347	4,473	6,724	7,228
Total other noninterest income	$ 10,505	$ 11,547	$ 19,990	$ 23,322