Debt (Narrative) (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2012
2011 Term Loan [Member]
Line of Credit Facility [Line Items]
Base Rate margin, basis points	0.0175
Two Thousand Twelve Two Term Loan [Member]
Line of Credit Facility [Line Items]
Base Rate margin, basis points	0.0175