Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Maturities of lease liabilities: Operating lease
2020	$ 62,331
2021	47,496
2022	23,746
2023	9,392
2024	5,682
Thereafter	2,826
Total lease payments	151,473
Less: Imputed interest	(8,768)
Total	142,705
Less: Current portion	(57,910)
Long-term portion of lease obligations	84,795
Maturities of lease liabilities: Finance lease
2020	80,834
2021	82,610
2022	48,307
2023	40,942
2024	30,707
Total lease payments	283,400
Less: Imputed interest	(50,201)
Total	233,199	$ 66,984
Less: Current portion	(61,493)
Long-term portion of lease obligations	171,706
Future minimum payments for total lease liabilities
2020	143,165
2021	130,106
2022	72,053
2023	50,334
2024	36,389
Thereafter	2,826
Total lease payments	434,873
Less: Imputed interest	(58,969)
Total	375,904
Less: Current portion	(119,403)
Long-term portion of lease obligations	$ 256,501