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Commitments and Contingencies (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]        
Operating lease rent expense $ 2,395,000 $ 2,968,000 $ 7,312,000 $ 8,879,000
Contingent rent 0 $ 0 0 $ 0
Contingent liability under letters of credit 61,002,000   61,002,000  
Outstanding obligations under construction agreements $ 39,418,000   $ 39,418,000