Stock-Based Compensation - Summary of stock options outstanding and exercisable (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	59,586
Weighted-Average Exercise Price (in dollars per share)	$ 22.26
Weighted-Average Remaining Contractual Term	2 years 2 months 12 days
Range Of Exercise Prices From Dollars 17.18 To 17.18
Stock options outstanding
Exercise price, low end of range	$ 17.18
Exercise price, high end of range	$ 17.18
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	4,435
Weighted-Average Exercise Price (in dollars per share)	$ 17.18
Weighted-Average Remaining Contractual Term	2 months 12 days
Range Of Exercise Prices From Dollars 17.48 To 17.48
Stock options outstanding
Exercise price, low end of range	$ 17.48
Exercise price, high end of range	$ 17.48
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	14,232
Weighted-Average Exercise Price (in dollars per share)	$ 17.48
Weighted-Average Remaining Contractual Term	2 years 2 months 12 days
Range Of Exercise Prices From Dollars 24.18 To 24.18
Stock options outstanding
Exercise price, low end of range	$ 24.18
Exercise price, high end of range	$ 24.18
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	17,318
Weighted-Average Exercise Price (in dollars per share)	$ 24.18
Weighted-Average Remaining Contractual Term	1 year 2 months 12 days
Range Of Exercise Prices From Dollars 24.68 To 24.68
Stock options outstanding
Exercise price, low end of range	$ 24.68
Exercise price, high end of range	$ 24.68
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	23,601
Weighted-Average Exercise Price (in dollars per share)	$ 24.68
Weighted-Average Remaining Contractual Term	3 years 2 months 12 days