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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Statement Of Cash Flows [Abstract]    
Interest expense, capitalized interest $ 1,592us-gaap_InterestPaidCapitalized $ 1,667us-gaap_InterestPaidCapitalized