Accumulated Other Comprehensive Income , Equity and Redeemable Noncontrolling Interests - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance			$ (139,243)
Ending Balance	$ (177,346)		(177,346)
Cumulative currency translation adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(99,541)	$ 3,692	(50,371)	$ 5,712
Other comprehensive income (loss) before reclassifications	7,177	5,591	(40,384)	3,571
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	(1,609)	0
Net current period other comprehensive income (loss)	7,177	5,591	(41,993)	3,571
Ending Balance	(92,364)	9,283	(92,364)	9,283
Benefit plan liability [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(81,100)	(33,413)	(86,861)	(33,406)
Other comprehensive income (loss) before reclassifications	(1,355)	175	4,021	334
Amounts reclassified from accumulated other comprehensive income (loss)	415	(251)	800	(417)
Net current period other comprehensive income (loss)	(940)	(76)	4,821	(83)
Ending Balance	(82,040)	(33,489)	(82,040)	(33,489)
Unrealized gains on investment securities [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance		1,146		0
Other comprehensive income (loss) before reclassifications		0		1,146
Amounts reclassified from accumulated other comprehensive income (loss)		(1,146)		(1,146)
Net current period other comprehensive income (loss)		(1,146)		0
Ending Balance		0		0
Fair value change of derivatives [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(2,595)	78	(2,011)	0
Other comprehensive income (loss) before reclassifications	(436)	76	(1,119)	149
Amounts reclassified from accumulated other comprehensive income (loss)	89	(55)	188	(50)
Net current period other comprehensive income (loss)	(347)	21	(931)	99
Ending Balance	(2,942)	99	(2,942)	99
Accumulated other comprehensive loss [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(183,236)	(28,497)	(139,243)	(27,694)
Other comprehensive income (loss) before reclassifications	5,386	5,842	(37,482)	5,200
Amounts reclassified from accumulated other comprehensive income (loss)	504	(1,452)	(621)	(1,613)
Net current period other comprehensive income (loss)	5,890	4,390	(38,103)	3,587
Ending Balance	$ (177,346)	$ (24,107)	$ (177,346)	$ (24,107)