Consolidated Statements Of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended				12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Revenue						$ 2,193,211		$ 2,291,586		$ 2,299,785
Expenses:
Direct operating	[1]					1,493,088		1,581,311		1,556,999
Marketing						35,674		35,293		30,227
Research and development						7,198		13,047		13,082
General and administrative						190,393		190,496		215,798
Restructuring and related costs (Note 11)						27,153		557		4,495
Depreciation and other						171,390		187,824		189,401
Amortization of intangible assets						13,550		14,654		10,907
Goodwill impairment (Note 6)				$ 85,900		85,890		0		0
Total expenses						2,024,336		2,023,182		2,020,909
Operating income						168,875		268,404		278,876
Other income (expense), net:
Income (loss) from equity method investments, net (Note 7)						(800)		(28,734)		19,928
Interest expense, net						(42,353)		(47,644)		(32,807)
Other, net						(2,657)		(1,185)		(3,599)
Total other expense, net						(45,810)		(77,563)		(16,478)
Income from continuing operations before income taxes						123,065		190,841		262,398
Income tax expense						(73,619)		(66,164)		(39,710)
Income from continuing operations						49,446		124,677		222,688
Loss from discontinued operations, net of tax (Note 12)						(5,109)		(18,059)		(47,896)
Net income						44,337		106,618		174,792
Foreign currency translation adjustment	[2]					684	[3]	457	[4]	856	[5]
Comprehensive income						45,021		107,075		175,648
Income from continuing operations attributable to common shares (Note 13):
Basic						48,117		120,748		217,215
Diluted						$ 48,118		$ 120,806		$ 217,394
Basic earnings (loss) per common share (Note 13):
Continuing operations (in usd per share)						$ 2.75		$ 5.98		$ 7.98
Discontinued operations (in usd per share)						(0.29)		(0.89)		(1.76)
Basic earnings per share (in usd per share)						2.46		5.09		6.22
Diluted earnings (loss) per common share (Note 13):
Continuing operations (in usd per share)						2.75		5.89		7.72
Discontinued operations (in usd per share)						(0.29)		(0.88)		(1.70)
Diluted earnings per share (in usd per share)						$ 2.46		$ 5.01		$ 6.02
Weighted average common shares [Abstract]
Weighted average common shares - basic (in shares)						17,467		20,192		27,216
Weighted average common shares - diluted (in shares)	[6]					17,487		20,503		28,169
Dividends declared per common share (in usd per share)		$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 1.20		$ 0		$ 0

[1] “Direct operating” excludes depreciation and other of $118.7 million, $125.7 million and $129.1 million for 2015, 2014 and 2013, respectively.

[2] Foreign currency translation adjustment had no tax effect in 2015, 2014 and 2013.

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

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

[5] Foreign currency translation adjustment had no tax effect in 2013.

[6] 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.