- Acquisitions (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Jan. 04, 2019 USD ($) Branch $ / shares shares	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Business Acquisition [Line Items]
Merger related expenses		$ 2,860	$ 0
Highlands Bancorp, Inc.
Business Acquisition [Line Items]
Number of bank branches operated | Branch	4
Business acquisition, conversion, shares issued | shares	1.015
Consideration paid through common stock | shares	2,837,524
Stock option payout price per share (in dollars per share) | $ / shares	$ 14.71
Average strike price (in dollars per share) | $ / shares	$ 8.09
Cash paid for redemption of stock options	$ 797
Identifiable intangible assets	$ 3,728
Merger related expenses		$ 2,860