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Financing Arrangements - Schedule of Subordinate Note Redemption (Detail) | 12 Months Ended
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Dec. 31, 2014
Debt Instrument Redemption [Line Items] |
Subordinated note redemption percentage | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
3rd anniversary of the Initial Issue Date [Member] |
Debt Instrument Redemption [Line Items] |
Subordinated note redemption percentage | 103.75%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodThreeMember
4th anniversary of the Initial Issue Date [Member] |
Debt Instrument Redemption [Line Items] |
Subordinated note redemption percentage | 101.875%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodFourMember
5th anniversary of the Initial Issue Date and thereafter [Member] |
Debt Instrument Redemption [Line Items] |
Subordinated note redemption percentage | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodFiveMember

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- Details
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Balance Type: | na
Period Type: | duration

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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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Period Type: | duration

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- Details
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Balance Type: |
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