Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock		Special Preferred Stock		Capital In Excess of Par Value	Accumulated Income	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2018	$ 947,994	$ 485	[1]	$ 0	[2]	$ 128,448	$ 912,201	$ (93,140)
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)	36,358						36,358
Dividends declared on common stock ($0.12 per share)	(5,811)						(5,811)
Other comprehensive income (loss)	2,261							2,261
Issuance of shares of common stock, net of shares withheld for taxes	(982)	1	[1]			(983)
Repurchase and retirement of shares of common stock	(11,086)	(4)	[1]				(11,082)
Share-based compensation expense	1,426					1,426
Ending balance at Mar. 31, 2019	975,060	482	[1]	0	[2]	128,891	936,566	(90,879)
Beginning balance at Dec. 31, 2019	1,081,796	461	[3]	0	[4]	135,651	1,049,567	(103,883)
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)	(144,372)						(144,372)
Dividends declared on common stock ($0.12 per share)	(5,514)						(5,514)
Other comprehensive income (loss)	1,331							1,331
Issuance of shares of common stock, net of shares withheld for taxes	(1,230)	1	[3]			(1,231)
Repurchase and retirement of shares of common stock	(7,510)	(2)	[3]				(7,508)
Share-based compensation expense	(135)					(135)
Ending balance at Mar. 31, 2020	$ 924,366	$ 460	[3]	$ 0	[4]	$ 134,285	$ 892,173	$ (102,552)

[1] Common Stock—$0.01 par value; 118,000,000 authorized as of March 31, 2019 and December 31, 2018.

[2] Special Preferred Stock—$0.01 par value; 2,000,000 shares authorized as of March 31, 2019 and December 31, 2018.

[3] Common Stock—$0.01 par value; 118,000,000 authorized as of March 31, 2020 and December 31, 2019.

[4] Special Preferred Stock—$0.01 par value; 2,000,000 shares authorized as of March 31, 2020 and December 31, 2019.