Acquisition - Narrative (Details) $ / shares in Units, $ in Thousands, shares in Millions		9 Months Ended
	Mar. 08, 2019 USD ($) office $ / shares shares	Sep. 30, 2019 USD ($)	Mar. 07, 2019 $ / shares	Dec. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Share price (in dollars per share) | $ / shares			$ 43.07
Goodwill acquired		$ 93,900
TCC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Full-service retail and commercial banking offices | office	6
Cash consideration per share (in dollars per share) | $ / shares	$ 1.84
Company shares issued per share acquired	0.1972
Shares issued | shares	4.0
Cash	$ 37,275
Total consideration paid	209,160
Merger related costs		$ 18,000		$ 1,300
Goodwill acquired	$ 93,900