Other Current Assets - Additional Information (Detail)
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12 Months Ended |
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Dec. 31, 2014
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Schedule Of Other Current Assets [Line Items] | |
Collateralized delinquency period of receivables | 7 days |
Crombie Lockwood Oamps [Member] | |
Schedule Of Other Current Assets [Line Items] | |
Acquisition agreement date | Jun. 16, 2014 |