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Real Estate - Additional Information (Detail) ft² in Thousands, $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2007 USD ($) Building | Jun. 30, 2017 USD ($) RenewalOptions | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Jun. 30, 2017 USD ($) ft² RenewalOptions Lease_Agreements | Jun. 30, 2016 USD ($) | Dec. 31, 2008 USD ($)
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sale of facility and associated real property | $ 109.0 |  |  |  |  |  |
Mortgage debt retired | 47.7 |  |  |  |  |  |
Cash received net of transaction costs and debt retirement | $ 61.0 |  |  |  |  |  |
Leaseback transaction lease period | 12 years |  |  |  |  |  |
Number of building leased | Building | 2 |  |  |  |  |  |
Net deferred gain on real estate sale |  | $ 9.1 |  |  | $ 9.1 |  | $ 39.1
Deferred gain recognized on real estate sale |  | 0.9 | $ 0.9 |  | $ 1.8 | $ 1.7 |
Lease expiration year |  |  |  |  | 2029 |  |
Lease security deposit |  | 4.7 |  |  | $ 4.7 |  |
Letter of credit |  | $ 3.0 |  |  | $ 3.0 |  |
Percentage of management fee included in the base annual rent |  | 3.50% |  |  |  |  |
Lease extension period |  | 10 years |  |  |  |  |
Number of times to renew the lease contract | RenewalOptions |  | 2 |  |  | 2 |  |
Subleased area | ft² |  |  |  |  | 16 |  |
Rental income from sublease agreement |  |  |  |  | $ 0.6 |  |
Amended Lease Term [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Lease expiration date |  | Dec. 31, 2029 |  |  |  |  |
Percentage reduction in base rental |  | 8.00% |  |  |  |  |
Tenant improvement allowances |  | $ 13.1 |  |  | 13.1 |  |
Lease security deposit |  | 3.0 |  |  | $ 3.0 |  |
Sublease |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of sublease agreements | Lease_Agreements |  |  |  |  | 1 |  |
Reversal of cease use expense |  | $ 0.5 |  | $ 0.8 |  |  |
Second Sublease |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Lease expiration date |  |  |  |  | 2018-03 |  |

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- Definition Amount of expense (reversal of expense) in connection with exit or disposal activity (including executory costs such as maintenance charges) net of estimated income from potential subleasing. + References No definition available. + Details
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- Definition The date of expiration of the sublease agreement between the entity and a third party, in CCYY-MM format. + References No definition available. + Details
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- Definition Letter of credit issued by the bank in lieu of a cash security deposit under the terms of a lease, secured by a deposit of equal amount with that bank. + References No definition available. + Details
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- Definition The term whereby the Company leased back the property in a sale leaseback transaction involving the sale of the property to another party and the lease of the property back to the Company, in PnY format. + References No definition available. + Details
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- Definition The carrying amount of mortgage loans on real estate that were sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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