XML 88 R71.htm IDEA: XBRL DOCUMENT

Backlog - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014 Contracts
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Backlog amount	$ 386.9
Number of contracts attributable to backlog	5
Contracts or Purchase Orders [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Backlog amount	366.9
Letters of Intent [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Backlog amount	20.0
Five Contracts, Letters of Intent, Notices to Proceed or Purchase Orders [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Backlog amount	$ 208.2
Backlog percentage	53.80%

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

+ References+ Details