Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 20,603	$ 20,889	$ 0
Leases not yet commenced	24,745
Increase in Operating leases due to new leases	1,000
Operating Lease, Cost	1,300
Operating lease liabilities	$ 20,603	$ 20,889	$ 0