Leases - Additional Information (Details)
ft² in Thousands, $ in Millions |
12 Months Ended |
|
Dec. 31, 2019 |
Dec. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2015
ft²
term
|
Dec. 31, 2011
ft²
lease
building
|
Jan. 01, 2019 |
| Lessee, Lease, Description [Line Items] |
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| Option to extend lease term |
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15 years
|
| Sublease income 2018 | $ |
|
$ 6.2
|
|
|
|
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| Rental expense | $ |
|
$ 17.3
|
$ 19.2
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| Corporate Headquarters |
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| Lessee, Lease, Description [Line Items] |
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| Number of leases | lease |
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|
|
|
2
|
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| Area of real estate property (in square feet) | ft² |
|
|
|
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1,100
|
|
| Lease agreements number of buildings | building |
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|
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2
|
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| Option to extend lease term |
|
|
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15 years
|
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| Optional term of lease agreement (in years) |
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|
|
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10 years
|
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| San Diego Lease |
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| Lessee, Lease, Description [Line Items] |
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| Area of real estate property (in square feet) | ft² |
|
|
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170
|
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| Length of lease |
|
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16 years
|
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| Amount of optional renewal terms | term |
|
|
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2
|
|
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| Optional renewal term length |
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5 years
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| Minimum |
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| Lessee, Lease, Description [Line Items] |
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| Capital leases, imputed interest rate |
1.00%
|
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| Maximum |
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| Lessee, Lease, Description [Line Items] |
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| Capital leases, imputed interest rate |
6.00%
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| Buildings |
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| Lessee, Lease, Description [Line Items] |
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| Property and equipment useful life |
40 years
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