Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, at beginning	$ 15,380	$ 0
Goodwill acquired through purchase		15,380
Goodwill purchase price adjustment	(23)
Goodwill, at end	15,357	15,380
Intangible Assets [Roll Forward]
Other intangibles, at beginning	958	0
Other intangibles acquired through purchase		990
Amortization expense	(317)	$ (32)
Other intangibles, at end	$ 541