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Acquisition (Detail Textuals 1) (USD $)
 3 Months Ended 6 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Nov. 15, 2013
Six3 Systems Holdings II Inc
Dec. 31, 2013
Six3 Systems Holdings II Inc
Dec. 31, 2013
Six3 Systems Holdings II Inc
Dec. 31, 2013
Six3 Systems Holdings II Inc
Retention Agreements With Acquired Entity Executive
Nov. 15, 2013
Six3 Systems Holdings II Inc
Customer Contracts And Customer Relationships
Dec. 31, 2013
Six3 Systems Holdings II Inc
Customer Contracts And Customer Relationships
Business Acquisition [Line Items]                    
Initial purchase consideration         $ 820,000,000          
Estimated cash and net working capital adjustment         25,800,000          
Escrow account         40,000,000          
Estimated consideration allocated to assets acquired and liabilities assumed         847,289,000          
Net working capital adjustment         1,400,000          
Value attributed to goodwill, customer contracts and customer relationships deductible for income tax purposes         55,100,000          
Amortization period                 14 years  
Revenue 894,186,000 931,627,000 1,758,451,000 1,862,863,000   48,900,000        
Net income 34,962,000 39,676,000 67,954,000 75,384,000   100,000        
Amortization of customer contracts and customer relationships                   2,800,000
Retention bonuses               800,000    
Acquisition-related expenses             $ 9,700,000