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Construction Services Noncontrolling Interests - Summary of Redeemable Noncontrolling Interest (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Redeemable Noncontrolling Interest [Line Items]
Balance, December 31, 2014	$ 20,042
Foreign currency exchange translation adjustment	(1,229)
Adjustment to redemption value	658
Balance, March 31, 2015	19,096
Redeemable Noncontrolling Interest (Temporary Equity) [Member]
Redeemable Noncontrolling Interest [Line Items]
Balance, December 31, 2014	20,042
Net income (loss) attributable to redeemable noncontrolling interest	(245)
Foreign currency exchange translation adjustment	(43)
Adjustment to redemption value	(658)
Balance, March 31, 2015	$ 19,096

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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