Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Feb. 28, 2018	Dec. 09, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Class of Warrant or Right [Line Items]
Shares Issued, Price Per Share						$ 5.15
Proceeds from Issuance of Common Stock		$ 109,700	$ (2)	$ 28,212
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 5.75
Warrants liability						$ 449		$ 2,073
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right						11,200,000
Fair Value Adjustment of Warrants			$ (1,624)	$ (11,129)	$ (5,301)
Total number of new units issued	7,772,021		0	7,772,021	0
underwriters option to purchase			2,900,000
per share net of underwrtiter discount			$ 4.9183
Common Stock, Shares, Issued		22,300,000				128,304,354		128,455,134
Unitssubjecttounderwritersoption							1,500,000
Common stock, shares authorized						250,000,000		250,000,000
Common stock, par value (in dollars per share)						$ 0.01		$ 0.01
Preferred stock, shares authorized						5,000,000
Preferred stock, par value						$ 0.01
Common Stock, Shares, Outstanding			125,737,565	125,737,565	114,985,072	125,481,163		125,737,565
Treasury stock, shares held			2,717,569	2,638,093	2,638,093	2,823,191		2,717,569
Common Shares Outstanding and Treasury Shares Held Rollforward [Table]
Common shares outstanding, beginning balance			125,737,565	115,877,704	114,985,072
Exercise of common stock options, net			0	65,524	0
Grants of restricted stock, net			(256,402)	2,022,316	892,632
Common shares outstanding, ending balance			125,481,163	125,737,565	115,877,704
Treasury stock, beginning balance			2,717,569	2,638,093	2,536,421
Shares received upon vesting of restricted stock, net			105,622	79,476	101,672
Treasury stock, ending balance			2,823,191	2,717,569	2,638,093
Amount authorized under stock repurchase program						$ 20,000