Financial Assets and Liabilities and Non-Financial Assets and Liabilities Measured at Fair Value Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended
Sep. 13, 2013 Strategic Promotional Partnership and Ad Sales Arrangement	Sep. 13, 2013 Strategic Promotional Partnership and Ad Sales Arrangement	Dec. 31, 2013 Interest Rate Cap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Payment towards notional amount of term loans			$ 71.3
Promotion period	5 years
Amount of promotion	$ 75
Percentage ownership of fully diluted shares of Pulser equity		15.00%

Nominal or face amount used to calculate payments on the derivative liability.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant