Leases - Supplemental Cash Flow Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from finance leases	$ 53
Operating cash flows from operating leases	5,288
Financing cash flows from finance leases	792
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 2,836