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Acquisitions (Detail)
In Thousands, unless otherwise specified
4 Months Ended 6 Months Ended 12 Months Ended 12 Months Ended
Jun. 30, 2012
SM Canada [Member]
USD ($)
Jun. 30, 2012
SM Canada [Member]
USD ($)
Mar. 31, 2012
SM Canada [Member]
USD ($)
Mar. 31, 2012
SM Canada [Member]
CAD
Feb. 21, 2012
SM Canada [Member]
CAD
Dec. 31, 2011
Cejon Acquisition [Member]
USD ($)
Jun. 30, 2012
Cejon Acquisition [Member]
May 25, 2011
Cejon Acquisition [Member]
USD ($)
Dec. 31, 2011
Topline Acquisition [Member]
USD ($)
May 20, 2011
Topline Acquisition [Member]
USD ($)
Business Acquisition, Cost of Acquired Entity, Cash Paid         29,367     $ 29,502   $ 56,128
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       38,000       25,000    
Business Acquisition, Contingent Consideration, at Fair Value 19,975 19,975                
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Years 15 15         15      
Business Combination, Acquisition Related Costs 951 800       531     529  
Financing Receivable, Gross     3,085 3,107            
Business Combination Contingent Consideration Arrangements Range Of Perfomance Indicators Value High               11,000    
Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High Tier Two               $ 33,000