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, 2015			91,428,274.000
Balance at beginning of period at Dec. 31, 2015		$ 545,504	$ 914	$ 679,916	$ (49,523)	$ (85,803)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of tax impact of share-based compensation (shares)			529,652
Issuance of common stock, net of tax impact of share-based compensation		(1,748)	$ 6	(1,754)
Share-based compensation expense		8,843		8,843
Share repurchases (shares)			(1,371,185)
Share repurchases		(25,000)	$ (14)	(24,986)
Net income (loss)		119,929			119,929
Net loss attributable to non-controlling interest		0
Dividends	[1]	(33,142)		(8,390)	(24,752)
Other comprehensive income (loss)		(3,830)				(3,830)
Balance at end of period (shares) at Dec. 31, 2016			90,586,741.000
Balance at end 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, net of tax impact of share-based compensation (shares)			537,018
Issuance of common stock, net of tax impact of share-based compensation		186	$ 5	181
Share-based compensation expense		5,417		5,417
Share repurchases (shares)			0
Net income (loss)		61,588			61,588
Net loss attributable to non-controlling interest		0
Dividends	[1]	(33,023)		0	(33,023)
Other comprehensive income (loss)		$ 11,223				11,223
Balance at end of period (shares) at Dec. 31, 2017		91,123,759	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, net of tax impact of share-based compensation (shares)			315,009
Issuance of common stock, net of tax impact of share-based compensation		315	$ 3	312
Share-based compensation expense		4,867		4,867
Reclassification of stranded tax effects related to the Tax Act	[2]				16,847	(16,847)
Share repurchases (shares)			0
Net income (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 (loss)		$ (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

[1] Cash dividends declared per common share were $0.30, $0.36 and $0.36 in the years ended December 31, 2018, 2017 and 2016, 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.

[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.