Consolidated Statements Of Stockholders' Equity (Deficit) - USD ($)	Total		Common Stock	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
BALANCE (in shares) at Dec. 31, 2014	18,926,242		18,926,242
BALANCE at Dec. 31, 2014	$ 97,378,000		$ 473,592,000	$ (996,293,000)	$ 620,389,000	$ (310,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from exercise of stock options, net (in shares)	49,000		48,992
Proceeds from exercise of stock options, net	$ 2,552,000		$ 2,552,000
Adjustments related to tax withholding for share-based compensation (in shares)			(57,546)
Adjustments related to tax withholding for share-based compensation	(3,852,000)		$ (3,852,000)
Share-based payments expense (in shares)			169,105
Share-based payments expense	11,875,000		$ 8,298,000	3,577,000
Excess tax benefit on share-based compensation expense	$ 691,000		$ 691,000
Repurchases of common stock (in shares)	(1,840,318)		(1,840,318)
Repurchases of common stock	$ (123,489,000)			(123,489,000)
Net income	27,319,000				27,319,000
Dividends	(16,201,000)				(16,201,000)
Foreign currency translation adjustment	$ 1,676,000	[1],[2]				1,676,000
BALANCE (in shares) at Sep. 30, 2015	17,246,475		17,246,475
BALANCE at Sep. 30, 2015	$ (2,051,000)		$ 481,281,000	(1,116,205,000)	631,507,000	1,366,000
Statement of Stockholders' Equity (Footnote) [Abstract]
Foreign currency translation adjustment, tax effect	0
BALANCE (in shares) at Jun. 30, 2015			18,169,984
BALANCE at Jun. 30, 2015	24,161,000		$ 477,259,000	(1,055,447,000)	599,332,000	3,017,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from exercise of stock options, net (in shares)			950
Proceeds from exercise of stock options, net	54,000		$ 54,000
Adjustments related to tax withholding for share-based compensation (in shares)			(2,321)
Adjustments related to tax withholding for share-based compensation	(153,000)		$ (153,000)
Share-based payments expense (in shares)			16,448
Share-based payments expense	3,588,000		$ 3,588,000	0
Excess tax benefit on share-based compensation expense	533,000		$ 533,000
Repurchases of common stock (in shares)			(938,586)
Repurchases of common stock	(60,758,000)			(60,758,000)
Net income	37,336,000				37,336,000
Dividends	(5,161,000)				(5,161,000)
Foreign currency translation adjustment	$ (1,651,000)	[1],[2]				(1,651,000)	[3]
BALANCE (in shares) at Sep. 30, 2015	17,246,475		17,246,475
BALANCE at Sep. 30, 2015	$ (2,051,000)		$ 481,281,000	$ (1,116,205,000)	$ 631,507,000	$ 1,366,000
Statement of Stockholders' Equity (Footnote) [Abstract]
Foreign currency translation adjustment, tax effect	$ 0

[1] Foreign currency translation adjustment had no tax effect for the nine months ended September 30, 2015.

[2] Foreign currency translation adjustment had no tax effect for the three and nine months ended September 30, 2015 and 2014, respectively.

[3] Foreign currency translation adjustment has no tax effect for the nine months ended September 30, 2015.