Consolidated Statements Of Stockholders' Equity (Deficit) - 3 months ended Mar. 31, 2016 - USD ($)		Total		Common Stock	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
BALANCE (in shares) at Dec. 31, 2015		16,607,516		16,607,516
BALANCE at Dec. 31, 2015		$ (22,074,000)		$ 485,163,000	$ (1,151,063,000)	$ 643,452,000	$ 374,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustments related to tax withholding for share-based compensation (in shares)				(47,309)
Adjustments related to tax withholding for share-based compensation		(1,425,000)		$ (1,425,000)
Share-based payments expense (in shares)				668,534
Share-based payments expense		5,318,000		$ 3,516,000	1,802,000
Tax deficiency on share-based compensation expense		(2,083,000)		$ (2,083,000)
Net income		38,451,000				38,451,000
Dividends		(15,438,000)				(15,438,000)
Foreign currency translation adjustment	[2]	$ (549,000)	[1],[3]				(549,000)
BALANCE (in shares) at Mar. 31, 2016		17,228,741		17,228,741
BALANCE at Mar. 31, 2016		$ 2,200,000		$ 485,171,000	$ (1,149,261,000)	$ 666,465,000	$ (175,000)
Statement of Stockholders' Equity (Footnote) [Abstract]
Foreign currency translation adjustment, tax effect		$ 0

[1] Foreign currency translation adjustment had no tax effect for the three months ended March 31, 2016 and 2015, respectively.

[2] Foreign currency translation adjustment had no tax effect for the three months ended March 31, 2016.

[3] Foreign currency translation adjustment had no tax effect for the three months ended March 31, 2016.