Quarterly report pursuant to Section 13 or 15(d)

Acquisition (Details)

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Acquisition (Details) (USD $)
In Thousands, unless otherwise specified
1 Months Ended
Jan. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Business Combinations [Abstract]      
Percentage of acquisition 68.00%    
Business Combination, Consideration Transferred $ 213,664    
Common stock issued for acquisition 132,686    
Payments to Acquire Businesses, Gross 80,978    
Business Combination, Total Fair Value 329,689    
Goodwill 294,074 642,613 348,432
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 40,170    
BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductiblePercent 70.00%    
Percent of future consideration issuable in shares 50.00%