Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Revenue	$ 608,636		$ 597,762
Expenses:
Direct operating	405,184	[1]	419,642	[1]
Marketing	8,420		6,993
Research and development	2,084		3,474
General and administrative	48,556		52,608
Restructuring and lease termination costs (Note 11)	15,851		557
Depreciation and other	42,686		47,942
Amortization of intangible assets	3,309		3,842
Total expenses	526,090		535,058
Operating income (loss)	82,546		62,704
Other expense, net:
Loss from equity method investments, net (Note 7)	(132)		(9,368)
Interest expense, net	(12,071)		(9,648)
Other, net	(2,346)		(648)
Total other expense, net	(14,549)		(19,664)
Income from continuing operations before income taxes	67,997		43,040
Income tax expense	(25,842)		(15,434)
Income from continuing operations	42,155		27,606
Loss from discontinued operations, net of tax (Note 12)	(6,556)		(4,431)
Net income	35,599		23,175
Foreign currency translation adjustment	2,854	[2],[3]	875	[2],[4]
Comprehensive income	38,453		24,050
Income from Continuing Operations Attributable to Common Shares
Basic	40,775		26,860
Diluted	$ 40,776		$ 26,879
Basic earnings (loss) per common share:
Continuing operations (in dollars per share)	$ 2.23		$ 1.12
Discontinued operations (in dollars per share)	$ (0.36)		$ (0.18)
Basic earnings per share	$ 1.87		$ 0.94
Diluted earnings (loss) per common share:
Continuing operations (in dollars per share)	$ 2.23		$ 1.09
Discontinued operations (in dollars per share)	$ (0.36)		$ (0.18)
Diluted earnings per common share	$ 1.87		$ 0.91
Weighted Average Number of Shares Outstanding, Basic	18,269		23,944
Weighted Average Number of Shares Outstanding, Diluted	18,286	[5]	24,575	[5]
Dividends declared per common share (Note 19)	$ 0.30		$ 0.00

[1] “Direct operating” excludes depreciation and other of $30.2 million and $31.7 million for the three months ended March 31, 2015 and 2014, respectively.

[2] Foreign currency translation adjustment had no tax effect for the three months ended March 31, 2015 and 2014, respectively.

[3] Foreign currency translation adjustment had no tax effect in 2015.

[4] Foreign currency translation adjustment had no tax effect in 2014.

[5] Participating securities were included in the calculation of diluted earnings per share using the two-class method, as this calculation was more dilutive than the calculation using the treasury stock method.