Other Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Noninterest Income [Abstract]
Income from bank-owned life insurance	$ 3,100	$ 3,097	$ 9,283	$ 8,632
Credit-related fees	2,762	2,521	7,900	8,297
Income from derivatives	1,363	1,339	4,474	4,484
Gain (loss) on sale of assets	989	400	(177)	4,465
Amortization of FDIC loss share receivable				(2,427)
Other miscellaneous	3,342	3,795	10,066	11,023
Total other noninterest income	$ 11,556	$ 11,152	$ 31,546	$ 34,474