Consolidated Statements Of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016		Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Revenue		$ 535,956		$ 608,636
Expenses:
Direct operating	[1]	375,967		405,184
Marketing		9,222		8,420
Research and development		1,045		2,084
General and administrative		47,770		48,556
Restructuring and related costs (Note 9)		3,275		15,851
Depreciation and other		36,118		42,686
Amortization of intangible assets		3,790		3,309
Total expenses		477,187		526,090
Operating income (loss)		58,769		82,546
Other income (expense), net:
Loss from equity method investments, net		(207)		(132)
Interest expense, net		(242)		(12,071)
Other, net		1,229		(2,346)
Total other income (expense), net		780		(14,549)
Income from continuing operations before income taxes		59,549		67,997
Income tax expense		(21,098)		(25,842)
Income from continuing operations		38,451		42,155
Loss from discontinued operations, net of tax		0		(6,556)
Net income		38,451		35,599
Foreign currency translation adjustment	[2]	(549)	[3],[4]	2,854	[5]
Comprehensive income		37,902		38,453
Income from continuing operations attributable to common shares (Note 11):
Basic		36,986		40,775
Diluted		$ 36,988		$ 40,776
Basic earnings (loss) per common share (Note 11):
Continuing operations (in usd per share)		$ 2.30		$ 2.23
Discontinued operations (in usd per share)		0.00		(0.36)
Basic earnings per common share (in usd per share)		2.30		1.87
Diluted earnings (loss) per common share (Note 11):
Continuing operations (in usd per share)		2.29		2.23
Discontinued operations (in usd per share)		0.00		(0.36)
Diluted earnings per common share (in usd per share)		$ 2.29		$ 1.87
Weighted average common shares used in basic and diluted per share calculations (Note 11):
Weighted average common shares - basic (in shares)		16,094		18,269
Weighted average common shares - diluted (in shares)	[6]	16,136		18,286
Dividends paid per common share (in usd per share)		$ 0.30		$ 0.30

[1] “Direct operating” excludes depreciation and other of $26.2 million and $30.2 million 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 and 2015, respectively.

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

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

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

[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.