Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Nov. 27, 2019	May 08, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2018	May 10, 2017
Class of Stock [Line Items]
Common stock shares authorized			100,000,000	100,000,000
Common stock, par value			$ 0.01	$ 0.01
Preferred stock shares authorized			50,000,000	50,000,000
Preferred stock, par value			$ 0.01	$ 0.01
Common stock shares issued			33,760,940	33,350,633
Common stock shares outstanding			33,760,940	33,350,633
Preferred stock shares outstanding			0	0
Gross proceeds from issuances of common stock					$ 79,052
Shares authorized to be repurchased						4,500,000
Shares available to be purchased			3,812,939
Common stock shares repurchased, shares					83,000
Common stock shares repurchased, value					$ 1,439
First Amended And Restated 2013 Long-Term Incentive Plan [Member]
Class of Stock [Line Items]
Common stock shares for stock award issuance							1,800,000
2017 Incentive Plan [Member]
Class of Stock [Line Items]
Common stock shares rolled into plan							600,000
Amended 2017 Incentive Plan [Member]
Class of Stock [Line Items]
Additional shares authorized		1,600,000
Common stock shares for stock award, available for issuance			700,000
Vesting of restricted stock units, shares			700,000	500,000
Distribution Agreement [Member]
Class of Stock [Line Items]
Aggregate offering price	$ 100,000
Available for sale, common stock			$ 100,000
Common stock shares sold and issued			0	0