Loans - Nonaccrual loans prior to Adoption of ASU 2016-13 (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Loans
Nonaccrual loans	$ 121,810	$ 33,141
Construction and land development
Loans
Nonaccrual loans	2,967	1,193
Consumer Owner Occupied Loans
Loans
Nonaccrual loans	37,881	9,718
Other income producing property
Loans
Nonaccrual loans	7,945	1,947
Commercial loans | Commercial non-owner occupied
Loans
Nonaccrual loans	9,643	1,154
Commercial loans | Commercial non-owner occupied real estate
Loans
Nonaccrual loans	12,610	2,347
Commercial loans | Commercial owner occupied real estate loan
Loans
Nonaccrual loans	36,590	4,385
Commercial loans | Commercial and industrial
Loans
Nonaccrual loans	7,210	6,913
Consumer | Home equity loans
Loans
Nonaccrual loans	13,003	4,640
Consumer | Real estate
Loans
Nonaccrual loans	50,884	14,358
Consumer | Consumer
Loans
Nonaccrual loans	$ 6,571	3,191
Non-acquired loans
Loans
Nonaccrual loans		22,302	$ 15,325
Non-acquired loans | Other income producing property
Loans
Nonaccrual loans		798	351
Non-acquired loans | Restructured loans
Loans
Nonaccrual loans		2,578	671
Non-acquired loans | Commercial loans | Construction and land development
Loans
Nonaccrual loans		363	299
Non-acquired loans | Commercial loans | Commercial non-owner occupied
Loans
Nonaccrual loans		732	481
Non-acquired loans | Commercial loans | Commercial non-owner occupied real estate
Loans
Nonaccrual loans		1,095	780
Non-acquired loans | Commercial loans | Commercial owner occupied real estate loan
Loans
Nonaccrual loans		3,482	3,459
Non-acquired loans | Commercial loans | Commercial and industrial
Loans
Nonaccrual loans		4,092	285
Non-acquired loans | Consumer | Consumer Owner Occupied Loans
Loans
Nonaccrual loans		7,202	6,688
Non-acquired loans | Consumer | Home equity loans
Loans
Nonaccrual loans		1,468	1,740
Non-acquired loans | Consumer | Real estate
Loans
Nonaccrual loans		8,670	8,428
Non-acquired loans | Consumer | Consumer
Loans
Nonaccrual loans		1,587	1,351
Acquired non-credit impaired loans
Loans
Nonaccrual loans		10,839	9,948
Acquired non-credit impaired loans | Other income producing property
Loans
Nonaccrual loans		1,101	228
Acquired non-credit impaired loans | Commercial loans | Construction and land development
Loans
Nonaccrual loans		699	1,207
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied
Loans
Nonaccrual loans		393	277
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied real estate
Loans
Nonaccrual loans		1,092	1,484
Acquired non-credit impaired loans | Commercial loans | Commercial owner occupied real estate loan
Loans
Nonaccrual loans		903	1,108
Acquired non-credit impaired loans | Commercial loans | Commercial and industrial
Loans
Nonaccrual loans		722	964
Acquired non-credit impaired loans | Consumer | Consumer Owner Occupied Loans
Loans
Nonaccrual loans		2,350	1,699
Acquired non-credit impaired loans | Consumer | Home equity loans
Loans
Nonaccrual loans		3,067	3,023
Acquired non-credit impaired loans | Consumer | Real estate
Loans
Nonaccrual loans		5,417	4,722
Acquired non-credit impaired loans | Consumer | Consumer
Loans
Nonaccrual loans		$ 1,604	$ 1,442