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Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies — There have been no material changes during the three months or six months ended June 30, 2015 to the commitments and contingencies previously reported in the 2014 Annual Report.