Leases (Supplemental lease information) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for operating leases	$ 11,827
Operating lease right-of-use assets	36,580
Current portion of operating lease liabilities	(13,463)
Long-term operating lease liabilities	(20,530)
Total operating lease liabilities	$ (33,993)
Weighted average remaining lease term - operating leases	3 years 6 months 15 days
Weighted average discount rate - operating leases	7.23%