Stock-Based Compensation Narrative (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement [Line Items]
Compensation expense	$ 1,875	$ 2,110	$ 5,403	$ 5,458
Stock-based compensation expense, net of tax benefit	$ 1,478	$ 1,659	$ 4,259	$ 4,264
Directors' Plan [Member]
Statement [Line Items]
Shares reserved for future grants under the stock option and compensation plan	180		180
Employee Equity Plan [Member]
Statement [Line Items]
Awards vesting period (in years)			3 years
Shares reserved for future grants under the stock option and compensation plan	9,300		9,300