Leases (Future Minimum Operating Lease Payments) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Commitments [Abstract]
Remainder of 2019	$ 11,555
2020	13,817
2021	10,925
2022	9,524
2023	7,792
Thereafter	85,876
Total future minimum lease payments	139,489
less: imputed interest	(35,804)
Total operating lease liability	103,685
less: operating lease liability - current	(10,650)
Total operating lease liability - non current	$ 93,035