CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Non-controlling interest
Balance at beginning of period (shares) at Dec. 31, 2016			90,586,741
Balance at beginning of period at Dec. 31, 2016		$ 610,556	$ 906	$ 653,629	$ 45,654	$ (89,633)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (shares)			652,636
Issuance of common stock		187	$ 6	181
Repurchase of shares for withholding taxes (shares)			(115,618)
Repurchase of shares for withholding taxes		(1)	$ (1)	0
Share-based compensation expense		5,417		5,417
Net income (loss)		61,588			61,588
Net loss		61,588
Net loss attributable to non-controlling interest		0
Dividends	[1]	(33,023)			(33,023)
Other comprehensive income(Note 15)		11,223				11,223
Balance at end of period (shares) at Dec. 31, 2017			91,123,759
Balance at end of period at Dec. 31, 2017		655,947	$ 911	659,227	74,219	(78,410)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (shares)			361,402
Issuance of common stock		315	$ 3	312
Repurchase of shares for withholding taxes (shares)			(46,393)
Repurchase of shares for withholding taxes		0	$ 0	0
Share-based compensation expense		4,867		4,867
Net income (loss)		(327,358)
Reclassification of stranded tax effects related to the Tax Act	[2]				16,847	(16,847)
Net loss		(326,900)			(326,900)
Fair value of non-controlling interest acquired		11,752					11,752
Net loss attributable to non-controlling interest		(458)					(458)
Issuance of subsidiary's common stock		444		(34)			478
Dividends	[1]	(27,885)		(2,742)	(25,143)
Other comprehensive income(Note 15)		$ (3,350)				(3,350)
Balance at end of period (shares) at Dec. 31, 2018		91,438,768	91,438,768
Balance at end of period at Dec. 31, 2018		$ 314,732	$ 914	661,630	(260,977)	(98,607)	11,772
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (shares)			623,207
Issuance of common stock		587	$ 6	581
Repurchase of shares for withholding taxes (shares)			(121,960)
Repurchase of shares for withholding taxes		(425)	$ (1)	(424)
Share-based compensation expense		2,062		2,062
Net income (loss)		(500,804)
Net loss		(499,942)			(499,942)
Net loss attributable to non-controlling interest		(862)					(862)
Issuance of subsidiary's common stock		(28)					(28)
Dividends forfeited	[1],[3]	192			192
Other comprehensive income(Note 15)		$ 13,444				13,444
Balance at end of period (shares) at Dec. 31, 2019		91,940,015	91,940,015
Balance at end of period at Dec. 31, 2019		$ (170,240)	$ 919	$ 663,849	$ (760,727)	$ (85,163)	$ 10,882

[1] Cash dividends declared per common share were $0.30 and $0.36 in the years ended December 31, 2018 and 2017, respectively. In February 2019, our Board of Directors reviewed the Company's dividend policy and determined that it would be in the best interest of the stockholders to suspend dividend payments. Thus, no dividends were declared in the year ended December 31, 2019.

[2] Refer to Note 1 - Recently Adopted Accounting Pronouncements within our Notes to Consolidated Financial Statements for additional details on the adoption of ASU No. 2018-02 during the first quarter of 2018.

[3] During the year ended December 31, 2019, participants forfeited accrued dividends related to previously-granted restricted share units ("RSUs") and performance share units ("PSUs"), causing a reduction to our accumulated deficit position. Under our long-term incentive compensation program, cash dividend equivalent units for RSUs and PSUs are accrued over time as our Board of Directors declares cash dividends and vest in cash at the same time as the underlying award.