Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2012
Contingencies And Commitments [Line Items]
Contractual commitment for advertising and marketing events at NFL stadium	$ 1,476,000
Outstanding performance bonds to secure performance under certain contracts or state tax requirements	21,199,000
Minimum months of salary paid as severance	3 months
Maximum months of salary paid as severance	24 months
Recovered legal costs	$ 2,000,000

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

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