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Subsequent Events - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 6 Months Ended | 12 Months Ended | 3 Months Ended
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Jun. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 Scenario, Forecast [Member] | Sep. 30, 2014 Scenario, Forecast [Member] Exchangeable Shares Of Canadian Subsidiary [Member]
Subsequent Event [Line Items] |  |  |  |
Cash paid for acquisition | $ 83,200 | $ 341,100 | $ 84,400 |
Number of shares issued for acquisition of company | 459,392 | 3,547,482 | 200,000 | 800,000
Aggregate value of common and exchangeable shares | $ 38,641 | $ 88,895 | $ 31,500 |

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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