Noninterest Income and Expense - Summary of Noninterest Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noninterest Income [Abstract]
Interchange income	$ 3,187	$ 3,405	$ 6,433	$ 6,806
Marine finance fees	157	201	303	563
SBA gains	181	691	320	1,327
BOLI income	887	927	1,773	1,842
Other income	2,147	2,503	5,499	4,769
Noninterest income, gross	13,776	14,043	28,445	26,888
Securities gains (losses), net	1,230	(466)	1,249	(475)
Total	15,006	13,577	29,694	26,413
Noninterest expense
Salaries and wages	20,226	19,420	43,924	37,926
Employee benefits	3,379	3,195	7,634	7,401
Outsourced data processing costs	4,059	3,876	8,692	7,721
Telephone/data lines	791	893	1,505	1,704
Occupancy	3,385	3,741	6,738	7,548
Furniture and equipment	1,358	1,544	2,981	3,301
Marketing	997	1,211	2,275	2,343
Legal and professional fees	2,277	2,033	5,640	4,880
FDIC assessments	266	337	266	825
Amortization of intangibles	1,483	1,456	2,939	2,914
Foreclosed property expense and net loss (gain) on sale	245	(174)	(70)	(214)
Other	3,933	3,468	7,673	7,750
Total	42,399	41,000	90,197	84,099
Service charges on deposit accounts
Noninterest Income [Abstract]
Revenue from contracts with customers	1,939	2,894	4,764	5,591
Wealth management income
Noninterest Income [Abstract]
Revenue from contracts with customers	1,719	1,688	3,586	3,141
Mortgage banking fees
Noninterest Income [Abstract]
Revenue from contracts with customers	$ 3,559	$ 1,734	$ 5,767	$ 2,849