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MATERIAL CHARGES AND OTHER OPERATING EXPENSES	12 Months Ended
MATERIAL CHARGES AND OTHER OPERATING EXPENSES	Dec. 31, 2014
Material Charges and Other Operating Expenses [Abstract]
MATERIAL CHARGES AND OTHER OPERATING EXPENSES	MATERIAL CHARGES AND OTHER OPERATING EXPENSES Operating expenses in 2014 included noncash asset impairment charges aggregating $574.0 million, including $565.7 million in connection with twelve of the Company's oldest jack-up drilling units and $8.3 million for a Company aircraft, which we sold later in 2014 at an immaterial loss. Operating expenses in 2013 included a $4.5 million noncash impairment charge on a dock and storage facility. Operating expenses in 2012 included $13.8 million of legal and consulting fees incurred in connection with the Company’s redomestication, $12.0 million of repair costs for the Rowan EXL I following its collision with a tanker, $8.7 million of pension settlement costs in connection with lump sum pension payments to employees of the Company’s former manufacturing subsidiary, $8.1 million of noncash asset impairment charges, and $2.3 million of incremental noncash share-based compensation cost in connection with the retirement of an employee.