Schedule of Applicable Margins Rate (Detail)	6 Months Ended
	Jun. 30, 2014
Revolving Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	3.75%
Term Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	4.25%
Senior Debt Ratio, ≥ 2.5x | Revolving Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	3.75%
Senior Debt Ratio, ≥ 2.5x | Term Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	4.25%
Senior Debt Ratio, 2.5x, but ≥ 2.0x | Revolving Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	3.25%
Senior Debt Ratio, 2.5x, but ≥ 2.0x | Term Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	3.75%
Senior Debt Ratio, 2.0 x | Revolving Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	2.75%
Senior Debt Ratio, 2.0 x | Term Loan
Debt Instrument [Line Items]
Debt instrument applicable margin	3.25%