- Financial Ratios Under Senior Credit Facility (Detail)	3 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Required
Debt Instrument [Line Items]
Leverage Ratio (maximum)	3.5	3.50	3.5	3.5
Interest Coverage Ratio (minimum)	2.55	2.55	2.55	2.55
Actual
Debt Instrument [Line Items]
Leverage Ratio (maximum)	1.39	1.86	1.79	1.98
Interest Coverage Ratio (minimum)	9.89	9.09	8.74	8.39