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Acquisitions - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified |  | 1 Months Ended | 6 Months Ended |  | 1 Months Ended |  |  | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jul. 02, 2012 Carrier Enterprise I | Jun. 30, 2013 Carrier Enterprise I | Jul. 01, 2009 Carrier Enterprise I | Jul. 30, 2011 Carrier Enterprise II Location | Jun. 30, 2013 Carrier Enterprise II | Apr. 30, 2011 Carrier Enterprise II Location | Apr. 27, 2012 Carrier Enterprise III Location | Apr. 27, 2012 Carrier Enterprise III Customer Relationships | Apr. 27, 2012 UTC Canada
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Controlling interest | 60.00% | 70.00% | 60.00% | 60.00% | 60.00% | 60.00% |  | 60.00% |  |
Non-controlling interest, ownership percentage | 40.00% |  |  | 40.00% | 40.00% |  |  | 40.00% |  |
Option to acquire interests, percentage |  |  | 10.00% | 10.00% |  |  |  |  |  |
Percentage of additional ownership acquired |  | 10.00% |  |  |  |  |  |  |  |
Cash consideration |  | $ 51,881 |  |  |  |  |  | $ 80,489 |  |
Option to purchase additional interest, date |  |  | 2014-07-01 |  |  |  |  |  |  |
Number of locations contributed to joint venture by non-controlling interest |  |  |  |  |  |  | 28 | 35 |  |
Number of locations contributed to joint venture by controlling interest |  |  |  |  | 14 |  |  |  |  |
Number of locations |  |  |  |  | 7 |  |  |  |  |
Shares issued to UTC Canada Corporation, an affiliate of Carrier Corporation |  |  |  |  |  |  |  |  |  | 1,250,000
Fair value of shares issued to UTC Canada Corporation |  |  |  |  |  |  |  |  |  | 93,250
Goodwill and intangibles, purchase price allocation |  |  |  |  |  |  |  | 216,463 |  |
Percent of tax basis of acquired goodwill amortized at a rate of 7% |  |  |  |  |  |  |  | 75.00% |  |
Goodwill amortization rate |  |  |  |  |  |  |  | 7.00% |  |
Fair value of acquired intangible assets |  |  |  |  |  |  |  | 151,172 |  |
Finite-lived intangible assets, average useful life, in years |  |  |  |  |  |  |  |  | 15 years |
Identified intangible assets, customer relationships |  |  |  |  |  |  |  |  | 55,657 |
Identified intangible assets, trade names and distribution rights |  |  |  |  |  |  |  | 95,515 |  |
Purchase price |  |  |  |  |  |  |  | $ 173,739 |  |

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