Financing Arrangements - Schedule of Subordinate Note Redemption (Detail)	9 Months Ended
	Sep. 30, 2014
Debt Instrument Redemption [Line Items]
Subordinated note redemption percentage	100.00%
3rd anniversary of the Initial Issue Date [Member]
Debt Instrument Redemption [Line Items]
Subordinated note redemption percentage	103.75%
4th anniversary of the Initial Issue Date [Member]
Debt Instrument Redemption [Line Items]
Subordinated note redemption percentage	101.875%
5th anniversary of the Initial Issue Date and thereafter [Member]
Debt Instrument Redemption [Line Items]
Subordinated note redemption percentage	100.00%