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Financing Arrangements - Additional Information (Detail) (USD $) | Dec. 31, 2013 Tranche A and Tranche A-1 Term Loan [Member] | Mar. 19, 2012 Tranche A and Tranche A-1 Term Loan [Member] | Dec. 31, 2013 Tranche B Term Loan [Member] | Mar. 19, 2012 Tranche B Term Loan [Member] | Jan. 31, 2014 7.50% Subordinated Notes [Member] Subsequent Events [Member]
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Debt Instrument [Line Items] |  |  |  |  |
Principal available | $ 25,000,000 | $ 25,000,000 | $ 100,000,000 | $ 100,000,000 | $ 150,000,000
Loans outstanding | $ 0 | $ 0 | $ 0 | $ 0 |
Interest rate on debt |  |  |  |  | 7.50%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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