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	$ 10,681	$ 11,400
Finance lease liability	4,430	11,400
Lease, Cost [Abstract]
Amortization of ROU assets	245
Interest on lease liabilities	45
Operating lease cost	862
Short-term lease cost	1,965
Total lease expense	3,117
Operating cash flows from operating leases	861
Financing cash flows from finance leases	218
ROU assets obtained in exchange for new lease liabilities, Finance leases	556
ROU assets obtained in exchange for new lease liabilities, Operating leases	$ 11,410
Weighted-average remaining lease term (years), Finance leases	4 years 2 months 15 days
Weighted-average remaining lease term (years), Operating leases	5 years 4 months 28 days
Weighted-average discount rate, Finance leases	4.70%
Weighted-average discount rate, Operating leases	5.00%
Assets and Liabilities, Lessee [Abstract]
Finance lease assets	$ 4,354
Operating lease ROU assets	10,681	11,400
Finance lease liabilities, Current	1,002		$ 883
Operating lease liabilities, Current	2,160
Finance lease liabilities, Noncurrent	3,428		3,209
Operating lease liabilities, Noncurrent	8,523
Finance Lease Liabilities, Payments
Remainder of 2019	892
2020	1,177
2021	1,177
2022	1,034
2023	577
Thereafter	22
Total lease payments	4,879
Less: Interest	(449)
Present value of lease liabilities	4,430	$ 11,400
Less: Current portion of lease obligation	(1,002)		(883)
Total long-term lease obligation	3,428		3,209
Operating Lease Liabilities, Payments Due
Remainder of 2019	1,993
2020	2,498
2021	2,102
2022	1,770
2023	1,668
Thereafter	2,111
Total lease payments	12,142
Less: Interest	(1,459)
Present value of lease liabilities	10,683
Less: Current portion of lease obligation	(2,160)
Total long-term lease obligation	$ 8,523
Capital Lease Maturities
2019			1,052
2020			1,052
2021			1,052
2022			909
2023			451
Thereafter			0
Total lease payments			4,516
Less: Interest			(424)
Present value of lease liabilities			4,092
Less: Current portion of lease obligation			(883)
Total long-term lease obligation			3,209
Operating Lease Maturities
2019			4,242
2020			2,258
2021			2,107
2022			1,782
2023			1,495
Thereafter			1,488
Total lease payments			$ 13,372