Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2013
Significant Of Accounting Policies [Line Items]
LP units convertible conversion ratio	1
Principal amount of senior unsecured notes	$ 120,000,000
Percentage of Likelihood of Tax Benefit Being Realized (as a percent)	50.00%
Minimum [Member]
Significant Of Accounting Policies [Line Items]
Estimated useful lives of the assets (in years)	3 years
Fair value of awards vesting period (in years)	1 year
Maximum [Member]
Significant Of Accounting Policies [Line Items]
Estimated useful lives of the assets (in years)	7 years
Fair value of awards vesting period (in years)	5 years

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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