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Commitments (Schedule Of Future Minimum Rental Payments For Operating Leases) (Details)
$ in Thousands
Dec. 31, 2015
USD ($)
Commitments [Abstract]  
2016 $ 10,685
2017 9,857
2018 8,823
2019 6,961
2020 5,776
Thereafter 65,005
Total future minimum lease payments $ 107,107