Subsequent Events (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Mar. 15, 2020 $ / shares	Jan. 02, 2020 USD ($) Installment $ / shares shares	Dec. 31, 2019 $ / shares	Dec. 31, 2018 $ / shares	Dec. 31, 2017 $ / shares
Subsequent Event [Line Items]
Common stock, dividends, cash paid (in dollars per share)			$ 0.300	$ 0.300	$ 0.300
Expected life of stock options (in years)			3 years 6 months	3 years 6 months	3 years 6 months
Subsequent Event
Subsequent Event [Line Items]
Common stock, dividends, cash paid (in dollars per share)	$ 0.075
Shares granted, value, forfeited | $		$ 3,600
Share price		$ 33.44
Granted (in shares) | shares		107,655
Expected life of stock options (in years)		1 year
Award vesting rate, initial year		33.33%
Quarterly award vesting installments after initial year | Installment		8