Right-of-Use ("ROU") Assets and Lease Liabilities - Schedule of Operating and Finance Lease Maturity (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases
2019 (excluding the nine months ended September 30, 2019)	$ 7,989
2020	30,941
2021	28,521
2022	22,564
2023	16,667
2024 and thereafter	24,545
Total lease payments	131,227
Less amount representing interest	(14,877)
Total	116,350
Current portion of lease liabilities	26,671
Long-term portion of lease liabilities	89,679
Finance Leases
2019 (excluding the nine months ended September 30, 2019)	770
2020	2,902
2021	2,440
2022	1,492
2023	970
2024 and thereafter	150
Total lease payments	8,724
Less amount representing interest	(719)
Total	8,005
Current portion of lease liabilities	2,639
Long-term portion of lease liabilities	5,366
Total
2019 (excluding the nine months ended September 30, 2019)	8,759
2020	33,843
2021	30,961
2022	24,056
2023	17,637
2024 and thereafter	24,695
Total lease payments	139,951
Less amount representing interest	(15,596)
Total	124,355
Current portion of lease liabilities	29,310
Long-term portion of lease liabilities	$ 95,045