Loans - Nonaccrual loans prior to Adoption of ASU 2016-13 (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Loans
Nonaccrual loans	$ 56,341	$ 33,141
Construction and land development
Loans
Nonaccrual loans	1,294	1,193
Consumer Owner Occupied Loans
Loans
Nonaccrual loans	19,614	9,718
Other income producing property
Loans
Nonaccrual loans	4,343	1,947
Commercial loans | Commercial non-owner occupied
Loans
Nonaccrual loans	2,863	1,154
Commercial loans | Commercial non-owner occupied real estate
Loans
Nonaccrual loans	4,157	2,347
Commercial loans | Commercial owner occupied real estate loan
Loans
Nonaccrual loans	9,498	4,385
Commercial loans | Commercial and industrial
Loans
Nonaccrual loans	4,834	6,913
Consumer | Home equity loans
Loans
Nonaccrual loans	8,891	4,640
Consumer | Real estate
Loans
Nonaccrual loans	28,505	14,358
Consumer | Consumer
Loans
Nonaccrual loans	$ 5,004	3,191
Non-acquired loans
Loans
Nonaccrual loans		22,302	$ 15,414
Non-acquired loans | Other income producing property
Loans
Nonaccrual loans		798	596
Non-acquired loans | Restructured loans
Loans
Nonaccrual loans		2,578	830
Non-acquired loans | Commercial loans | Construction and land development
Loans
Nonaccrual loans		363	414
Non-acquired loans | Commercial loans | Commercial non-owner occupied
Loans
Nonaccrual loans		732	505
Non-acquired loans | Commercial loans | Commercial non-owner occupied real estate
Loans
Nonaccrual loans		1,095	919
Non-acquired loans | Commercial loans | Commercial owner occupied real estate loan
Loans
Nonaccrual loans		3,482	1,215
Non-acquired loans | Commercial loans | Commercial and industrial
Loans
Nonaccrual loans		4,092	286
Non-acquired loans | Consumer | Consumer Owner Occupied Loans
Loans
Nonaccrual loans		7,202	7,658
Non-acquired loans | Consumer | Home equity loans
Loans
Nonaccrual loans		1,468	2,666
Non-acquired loans | Consumer | Real estate
Loans
Nonaccrual loans		8,670	10,324
Non-acquired loans | Consumer | Consumer
Loans
Nonaccrual loans		1,587	1,244
Acquired non-credit impaired loans
Loans
Nonaccrual loans		10,839	14,294
Acquired non-credit impaired loans | Other income producing property
Loans
Nonaccrual loans		1,101	205
Acquired non-credit impaired loans | Commercial loans | Construction and land development
Loans
Nonaccrual loans		699	1,114
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied
Loans
Nonaccrual loans		393	289
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied real estate
Loans
Nonaccrual loans		1,092	1,403
Acquired non-credit impaired loans | Commercial loans | Commercial owner occupied real estate loan
Loans
Nonaccrual loans		903	1,664
Acquired non-credit impaired loans | Commercial loans | Commercial and industrial
Loans
Nonaccrual loans		722	915
Acquired non-credit impaired loans | Consumer | Consumer Owner Occupied Loans
Loans
Nonaccrual loans		2,350	3,693
Acquired non-credit impaired loans | Consumer | Home equity loans
Loans
Nonaccrual loans		3,067	4,750
Acquired non-credit impaired loans | Consumer | Real estate
Loans
Nonaccrual loans		5,417	8,443
Acquired non-credit impaired loans | Consumer | Consumer
Loans
Nonaccrual loans		$ 1,604	$ 1,664