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Subsequent Events - Additional Information (Detail) (Subsequent Event)
1 Months Ended 1 Months Ended
Jan. 15, 2014
Thomas Plant
USD ($)
Jan. 15, 2014
Thomas Plant
GBP (£)
Jan. 15, 2014
Thomas Plant
Maximum
USD ($)
Jan. 15, 2014
Thomas Plant
Maximum
GBP (£)
Jan. 13, 2014
Amended And Restated Credit Agreement
USD ($)
Subsequent Event [Line Items]          
Revolving credit facility         $ 175,000,000
Maturity date         Jan. 11, 2019
New Term Loan facility         50,000,000
Percentage of equity interests acquired 100.00% 100.00%      
Business acquisition cash paid, net of cash acquired 61,500,000 37,400,000      
Business acquisition, issuance of common stock shares 581,432 581,432      
Business acquisition, common stock value 9,000,000 5,500,000      
Business acquisition, contingent cash consideration payable     $ 9,000,000 £ 5,500,000