Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Nov. 27, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	May 08, 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		33,319,125		33,067,375
Common stock shares outstanding		33,319,125		33,067,375
Common stock shares issued related to vesting of RSUs		400,000	400,000
Common stock shares sold and issued		0	0
Number of shares authorized to be repurchased						4,500,000
Common stock shares repurchased, shares			83,000
Common stock shares repurchased, value			$ 1,438
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 for stock award, available for issuance		1,700,000			1,631,000
Common stock shares rolled into plan							600,000
Distribution Agreement [Member]
Class of Stock [Line Items]
Aggregate offering price	$ 100,000
Available for sale		$ 100,000