Commitments and Contingencies (Details 1) $ in Thousands	Dec. 31, 2015 USD ($)
Operating leases future minimum rentals and service income
Future Rental and Service Income - Operating Leases, 2016	$ 82,001
Future Rental and Service Income - Operating Leases, 2017	62,893
Future Rental and Service Income - Operating Leases, 2018	46,633
Future Rental and Service Income - Operating Leases, 2019	30,928
Future Rental and Service Income - Operating Leases, 2020	15,770
Future Rental and Service Income - Operating Leases, Future years	19,666
Future Rental and Service Income - Operating Leases, Total	257,891
Future Minimum Rental Payments, 2016	17,002
Future Minimum Rental Payments, 2017	14,944
Future Minimum Rental Payments, 2018	11,374
Future Minimum Rental Payments, 2019	6,997
Future Minimum Rental Payments, 2020	5,600
Future Minimum Rental Payments, Future years	7,091
Future Minimum Rental Payments, Total	$ 63,008