Other Noninterest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Noninterest Expense [Abstract]
Lending and other client related processing costs	$ 24,237	$ 23,768	$ 19,867
Telephone	9,404	10,647	9,793
Data processing services	10,811	10,251	9,014
Dues and publications	4,605	3,263	2,828
Postage and supplies	2,799	2,797	2,851
Other	21,682	21,419	17,890
Total other noninterest expense	$ 73,538	$ 72,145	$ 62,243