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Long-term Debt - Remaining Quarterly Amortization of Term Facilities (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2012
Term Loan A-1 Facility [Member] | March 31, 2013 - September 30, 2013 [Member] |
Debt Instrument [Line Items] |
Principal amount | $ 6,750,000
Term Loan A-1 Facility [Member] | December 31, 2013 - March 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 6,750,000
Term Loan A-1 Facility [Member] | June 30, 2014 - December 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 13,500,000
Term Loan A-1 Facility [Member] | March 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 13,500,000
Term Loan A-1 Facility [Member] | June 30, 2015 - September 30, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 37,125,000
Term Loan A-1 Facility [Member] | December 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 74,250,000
Term Loan A-1 Facility [Member] | March 31, 2016 - September 30, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term Loan A-1 Facility [Member] | December 31, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term Loan A-1 Facility [Member] | March 31, 2017 - June 30, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term Loan A-1 Facility [Member] | August 9, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term loan A-2 Facility [Member] | March 31, 2013 - September 30, 2013 [Member] |
Debt Instrument [Line Items] |
Principal amount | 750,000
Term loan A-2 Facility [Member] | December 31, 2013 - March 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 750,000
Term loan A-2 Facility [Member] | June 30, 2014 - December 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 1,500,000
Term loan A-2 Facility [Member] | March 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 1,500,000
Term loan A-2 Facility [Member] | June 30, 2015 - September 30, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 4,125,000
Term loan A-2 Facility [Member] | December 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 8,250,000
Term loan A-2 Facility [Member] | March 31, 2016 - September 30, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term loan A-2 Facility [Member] | December 31, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term loan A-2 Facility [Member] | March 31, 2017 - June 30, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term loan A-2 Facility [Member] | August 9, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term Loan A-3 Facility [Member] | March 31, 2013 - September 30, 2013 [Member] |
Debt Instrument [Line Items] |
Principal amount | 625,000
Term Loan A-3 Facility [Member] | December 31, 2013 - March 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 625,000
Term Loan A-3 Facility [Member] | June 30, 2014 - December 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 625,000
Term Loan A-3 Facility [Member] | March 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 1,250,000
Term Loan A-3 Facility [Member] | June 30, 2015 - September 30, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 1,250,000
Term Loan A-3 Facility [Member] | December 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 1,250,000
Term Loan A-3 Facility [Member] | March 31, 2016 - September 30, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount | 1,250,000
Term Loan A-3 Facility [Member] | December 31, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount | 1,250,000
Term Loan A-3 Facility [Member] | March 31, 2017 - June 30, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount | 21,250,000
Term Loan A-3 Facility [Member] | August 9, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount | 42,500,000
Term B Facility [Member] | March 31, 2013 - September 30, 2013 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term B Facility [Member] | December 31, 2013 - March 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 57,400
Term B Facility [Member] | June 30, 2014 - December 31, 2014 [Member] |
Debt Instrument [Line Items] |
Principal amount | 57,400
Term B Facility [Member] | March 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 57,400
Term B Facility [Member] | June 30, 2015 - September 30, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 57,400
Term B Facility [Member] | December 31, 2015 [Member] |
Debt Instrument [Line Items] |
Principal amount | 57,400
Term B Facility [Member] | March 31, 2016 - September 30, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount | 57,400
Term B Facility [Member] | December 31, 2016 [Member] |
Debt Instrument [Line Items] |
Principal amount | 21,474,700
Term B Facility [Member] | March 31, 2017 - June 30, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount |
Term B Facility [Member] | August 9, 2017 [Member] |
Debt Instrument [Line Items] |
Principal amount |

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- Definition Amount of the required periodic payments applied to principal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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Balance Type: | debit
Period Type: | duration