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Acquisitions and Divestitures - Dynamic Acquisition - Unaudited Pro Forma Results of Operations (Parenthetical) (Details) (USD $)
 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Apr. 17, 2012
Dynamic Acquisition
Sep. 30, 2012
Dynamic Acquisition
Sep. 30, 2012
Dynamic Acquisition
Sep. 30, 2012
Pro Forma Adjustment
Dynamic Acquisition
Business Acquisition                
Acquisition related costs           $ 500,000 $ 12,900,000 $ (12,900,000)
Bargain purchase gain 0 0 0 (122,696,000) (122,696,000) [1]     122,696,000
Reversal of deferred tax asset valuation allowance     (4,702,000) 100,288,000       (100,288,000)
Fees to secure financing for acquisition             $ 10,900,000 $ (10,900,000)
[1] The bargain purchase gain results from the excess of the fair value of net assets acquired over consideration paid. To validate the bargain purchase gain on this acquisition, the Company reviewed its initial identification and valuation of assets acquired and liabilities assumed. The Company believes it was able to acquire Dynamic for less than the estimated fair value of its net assets due to their offshore location resulting in less bidding competition.