Leases - Additional Information (Detail) - 6 months ended Jun. 30, 2016 ¥ in Thousands, $ in Thousands	JPY (¥)	USD ($)
TY5 Tokyo \| Equipment
Capital Leased Assets [Line Items]
Effective interest rate	6.33%
Capital lease obligation	¥ 3,074,947	$ 29,765
Discontinued operations held-for-sale \| Other financing obligations (1)
Capital Leased Assets [Line Items]
Capital lease obligation		$ 55,396

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 7

Name:	us-gaap_CapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant