Business Combinations - United American (Details) - United American Bank	May 04, 2018 USD ($) $ / shares shares
Business Combinations
Aggregate transaction value	$ 56,417,000
Fixed exchange ratio of company's common stock	2.1644
Shares issued in acquisition | shares	2,826,032
Total cash paid	$ 9,137,000
Issuance of shares of common stock to holders of restricted stock	47,280,000
Series A Preferred Stock
Business Combinations
Total cash paid	8,700,000
Series B Preferred Stock
Business Combinations
Total cash paid	$ 435,000
Series A and Series B Preferred Stock
Business Combinations
Cash issued per share | $ / shares	$ 1,000
Other
Business Combinations
Total cash paid	$ 2,000