Leases Leases - Minimum Lease Payments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Leases, After Adoption of 842
2019 Remaining	$ 3,419
2020	4,203
2021	3,325
2022	2,449
2023	1,173
2024	0
Thereafter	0
Total minimum lease payments	14,569
Sublease income, After Adoption of 842
2019 Remaining	(246)
2020	(82)
2021	0
2022	0
2023	0
2024	0
Thereafter	0
Total minimum lease payments	(328)
Net, After Adoption of 842
2019 Remaining	3,173
2020	4,121
2021	3,325
2022	2,449
2023	1,173
2024	0
Thereafter	0
Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due	14,241
Less: Amount representing interest	(1,467)
Present value of lease payments	$ 12,774
Operating Leases, Before Adoption of 842
2019		$ 3,670
2020		3,572
2021		2,961
2022		2,001
2023		573
Thereafter		0
Total minimum lease payments		12,777
Capital Leases, Before Adoption of 842
2019		40
2020		36
2021		0
2022		0
2023		0
Thereafter		0
Total minimum lease payments		76
Less: Amount representing interest		(6)
Capital lease obligation		$ 70

Lessee, Operating Lease, Liability, Payments, Due Year Six

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Lessee, Operating Lease, Liability, Payments, Due after Year Six

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Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income

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Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due After Year Six

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Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Five

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Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Four

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Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Three

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Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Two

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Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Undiscounted Excess Amount

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Lessee, Operating Lease, Liability, Payments, Net Sublease Income, Fiscal Year Maturity [Abstract]

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments for capital leases 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 minimum lease payments for capital leases due in the third 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 minimum lease payments for capital leases due in the second 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 minimum lease payments for capital leases due after 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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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Amount of lessee's undiscounted obligation for lease payments for operating lease.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

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Amount of lease payments to be received by lessor for operating lease.

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Amount of lease payments to be received by lessor in fifth fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.

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Amount of lease payments to be received by lessor after fifth fiscal year following latest statement of financial position date for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.

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Amount of lease payments to be received by lessor in second fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.

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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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