Basis of Presentation and Significant Accounting Policies - Components of Accumulated Other Comprehensive Income (Loss) Reclassified (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (140,131)		$ (94,413)
Other comprehensive income (loss) before reclassification	12,014		(7,835)
Amounts reclassified from AOCI	5,375		1,551
Other comprehensive income, net of tax including minority interest effect	17,389		(6,284)
Other comprehensive income, net of tax	17,356	[1]	(6,296)	[1]
Ending Balance	(122,742)		(100,697)
Unrealized holding loss on investment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	238		(2,315)
Other comprehensive income (loss) before reclassification	(24)		401
Other comprehensive income, net of tax	(24)		401
Ending Balance	214		(1,914)
Deferred gain (loss) on derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(45,386)		11,734
Other comprehensive income (loss) before reclassification	12,358		(15,450)
Other comprehensive income, net of tax	14,562		(17,554)
Ending Balance	(30,824)		(5,820)
Foreign currency gain (loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,562)		(3,366)
Other comprehensive income (loss) before reclassification	(320)		7,214
Other comprehensive income, net of tax	(320)		7,214
Ending Balance	(2,882)		3,848
Defined benefit pension plans loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(92,421)		(100,466)
Other comprehensive income, net of tax	3,171		3,655
Ending Balance	$ (89,250)		$ (96,811)

[1] The tax impacts on amounts presented in other comprehensive income are not significant.