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Operating Leases Minimum Future Rentals from Noncancelable Operating Leases (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Leases, Operating [Abstract]  
2017 $ 169,775
2018 142,294
2019 109,111
2020 85,096
2021 64,793
Thereafter 170,658
Total $ 741,727