Other Expenses (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Expenses
Consulting and outside services		$ 4,050	$ 1,938	$ 8,604	$ 5,715
Mergers and acquisition expenses		792	2,058	7,311	4,103
Loan expenses	[1]	4,060	924	5,867	2,726
Telephone		1,314	1,216	3,865	3,601
Debit card expenses		1,414	1,699	3,704	5,003
VIE amortization and other expenses		1,510	1,427	3,396	2,878
Business development		1,139	1,176	3,110	3,189
Printing and supplies		877	735	2,704	2,246
Postage		851	831	2,479	2,487
Employee expenses		560	1,245	2,247	3,646
Accounting and audit fees		455	365	1,453	1,290
Checking and operating expenses		355	361	1,263	1,353
Legal fees		206	338	1,025	926
ATM expenses		245	299	373	1,312
Other		958	991	2,828	2,679
Total other expenses		$ 18,786	$ 15,603	$ 50,229	$ 43,154

[1] Loan expenses include credit loss expense for off-balance sheet credit exposures.