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Subsequent Events (Details) - USD ($) $ in Thousands	Feb. 28, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Minimum lease payments		$ 27,939
Lease payments, Year 1		4,683
Lease payments, Year 2		3,569
Lease payments, Year 3		4,914
Lease payments, Year 4		5,052
Lease payments, Year 5		$ 5,194
Subsequent Event
Subsequent Event [Line Items]
Minimum lease payments	$ 14,300
Subsequent Event | Minimum
Subsequent Event [Line Items]
Lease payments, Year 1	1,400
Lease payments, Year 2	1,400
Lease payments, Year 3	1,400
Lease payments, Year 4	1,400
Lease payments, Year 5	1,400
Lease payments, Year 6	1,400
Lease payments, Year 7	1,400
Lease payments, Year 8	1,400
Lease payments, Year 9	1,400
Lease payments, Year 10	1,400
Subsequent Event | Maximum
Subsequent Event [Line Items]
Lease payments, Year 1	1,800
Lease payments, Year 2	1,800
Lease payments, Year 3	1,800
Lease payments, Year 4	1,800
Lease payments, Year 5	1,800
Lease payments, Year 6	1,800
Lease payments, Year 7	1,800
Lease payments, Year 8	1,800
Lease payments, Year 9	1,800
Lease payments, Year 10	$ 1,800

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Operating leases future minimum payments due in Seven years.

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Operating leases future minimum payments due in six years.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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