Property and Equipment and Leases Future Minimum Lease Payments for Capital and Operating Leases (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Capital Leases, Future Minimum Payments, Due 2018	$ 9,624
Capital Leases, Future Minimum Payments Due 2019	9,103
Capital Leases, Future Minimum Payments, Due 2020	15,593
Capital Leases, Future Minimum Payments, Due 2021	7,320
Capital Leases, Future Minimum Payments, Due 2022	12,381
Capital Leases, Future Minimum Payments, Due Thereafter	20,967
Capital Leases, Future Minimum Payments Due	74,988
Operating Leases, Future Minimum Payments, Due 2018	100,952
Operating Leases, Future Minimum Payments, Due 2019	81,637
Operating Leases, Future Minimum Payments, Due 2020	67,973
Operating Leases, Future Minimum Payments, Due 2021	55,408
Operating Leases, Future Minimum Payments, Due 2022	44,893
Operating Leases, Future Minimum Payments, Due Thereafter	263,653
Operating Leases, Future Minimum Payments Due	614,516
Total Capital and Operating Leases, Future Minimum Payments, Due 2018	110,576
Total Capital and Operating Leases, Future Minimum Payments, Due 2019	90,740
Total Capital and Operating Leases, Future Minimum Payments, Due 2020	83,566
Total Capital and Operating Leases, Future Minimum Payments, Due 2021	62,728
Total Capital and Operating Leases, Future Minimum Payments, Due 2022	57,274
Total Capital and Operating Leases, Future Minimum Payments, Due Thereafter	284,620
Total Capital and Operating Leases, Future Minimum Payments	$ 689,504