Leases (Future Lease Payments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Leases
2019 (excluding the nine months ended September 30, 2019)	$ 10,769
2020	39,425
2021	30,498
2022	25,032
2023	21,235
Thereafter	95,094
Total future minimum lease payments	222,053
Less: Imputed interest	(40,172)
Total	181,881
Other current liabilities	35,042
Operating lease liabilities	146,839
Total operating leases liabilities	181,881
Finance Lease, Liability, Payment, Due [Abstract]
2019 (excluding the nine months ended September 30, 2019)	1,321
2020	4,353
2021	2,854
2022	1,623
2023	850
Thereafter	945
Total future minimum lease payments	11,946
Less: Imputed interest	(700)
Total	11,246
Debt due within one year	4,342
Long-term debt due after one year	6,904
Total	$ 11,246
2019		$ 68,443
2020		49,874
2021		38,446
2022		28,496
2023		21,473
Thereafter		66,518
Total future minimum lease payments		$ 273,250