Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended
	May 19, 2021	Nov. 27, 2019	May 08, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Nov. 06, 2018	May 10, 2017
Class of Stock [Line Items]
Common stock shares authorized				100,000,000		100,000,000		100,000,000
Common stock, par value				$ 0.01		$ 0.01		$ 0.01
Preferred stock shares authorized				50,000,000		50,000,000		50,000,000
Preferred stock, par value				$ 0.01		$ 0.01		$ 0.01
Common stock shares issued				33,760,940		33,760,940		33,350,633
Common stock shares outstanding				33,760,940		33,760,940		33,350,633
Preferred stock shares outstanding				0		0		0
Shares authorized to be repurchased									4,500,000
Dividends, date declared	May 19, 2021
Cash dividends declared per share	$ 0.15
Cash dividends declared	$ 5,100			$ 5,065		$ 5,065
Dividends, date to be paid	Jun. 16, 2021
Dividends, date of record	Jun. 02, 2021
Maximum [Member]
Class of Stock [Line Items]
Shares available to be purchased				3,812,939		3,812,939
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			1,631,000
Common stock shares for stock award, available for issuance				700,000		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				$ 100,000		$ 100,000
Common stock shares sold and issued				0	0	0	0