CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) (in thousands, except share data and dividends per share) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Cash dividends declared per share	$ 0.05
Balances, Common Stock, Shares, Outstanding, Beginning at Dec. 31, 2018		112,241,966
Balances, Total Stockholders' Equity, Beginning at Dec. 31, 2018	$ 2,920,322	$ 1,122	$ 1,765,738	$ 1,165,842	$ (12,380)
Increase (Decrease) in Stockholders' Equity
Net loss	(177,568)			(177,568)
Other comprehensive income	263				263
Cash dividends declared, per share	(5,612)			(5,612)
Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings (Shares)		2,579
Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings (Amount)	(18)	$ 0	(18)
Stock-based compensation expense	5,838		5,838
Balances, Common Stock, Shares, Outstanding, Ending at Mar. 31, 2019		112,244,545
Balances, Total Stockholders' Equity, Ending at Mar. 31, 2019	$ 2,743,225	$ 1,122	1,771,558	982,662	(12,117)
Cash dividends declared per share	$ 0.01
Balances, Common Stock, Shares, Outstanding, Beginning at Dec. 31, 2019	112,987,952	112,987,952
Balances, Total Stockholders' Equity, Beginning at Dec. 31, 2019	$ 2,748,994	$ 1,130	1,791,596	967,587	(11,319)
Increase (Decrease) in Stockholders' Equity
Net loss	(411,895)			(411,895)
Other comprehensive income	190				190
Cash dividends declared, per share	(1,130)			(1,130)
Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings (Shares)		730
Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings (Amount)	(3)	$ 0	(3)
Stock-based compensation expense	$ 5,561		5,561
Balances, Common Stock, Shares, Outstanding, Ending at Mar. 31, 2020	112,988,682	112,988,682
Balances, Total Stockholders' Equity, Ending at Mar. 31, 2020	$ 2,341,717	$ 1,130	$ 1,797,154	$ 554,562	$ (11,129)