Financial Instruments and Fair Value Measurements - Schedule of Fair Value of Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Asset	$ 12,527	$ 20,241
Liability	42,910	35,940
AOCI	(40,425)	(14,045)
Net investment hedges - euro denominated [Member]
Derivatives, Fair Value [Line Items]
Asset		137
Liability	37,842	30,302
AOCI	(35,334)	(21,705)
Net investment hedges - yen denominated [Member]
Derivatives, Fair Value [Line Items]
Asset	12,527	20,104
AOCI	12,623	22,102
Interest rate swap hedges [Member]
Derivatives, Fair Value [Line Items]
Liability	5,068	5,638
AOCI	(781)	(591)
Our share of derivatives from unconsolidated co-investment ventures [Member]
Derivatives, Fair Value [Line Items]
AOCI	$ (16,933)	$ (13,851)

Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

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- Definition

Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

+ References

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- Definition

Cumulative adjustment resulting from gains and losses on foreign currency derivatives that are designated as, and are effective as, hedges of a net investment in a foreign entity, commencing as of the designation date. Adjustment reported in equity as part of accumulated other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (b),(c)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

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