Leases (Summary of Maturity of Lease Liabilities) (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Leases
2019	$ 18,304
2020	36,305
2021	32,047
2022	34,017
2023	34,554
Thereafter	124,227
Total lease payments	279,454
Less: Interest	48,583
Present value of lease liabilities	230,871
Finance Leases
2019	3,365
2020	5,886
2021	4,412
2022	4,439
2023	4,466
Thereafter	10,088
Total lease payments	32,656
Less: Interest	8,747
Present value of lease liabilities	23,909
Total
2019	21,669
2020	42,191
2021	36,459
2022	38,456
2023	39,020
Thereafter	134,315
Total lease payments	312,110
Less: Interest	57,330
Total lease liabilities	$ 254,780