XML 21 R29.htm IDEA: XBRL DOCUMENT v2.4.0.8
Debt - Additional Information (Detail) (USD $)
Jun. 30, 2014
Jun. 30, 2014
Revolving Credit Facility [Member]
Dec. 17, 2013
Revolving Credit Facility [Member]
Revolver Loans Second Amendment Portion Effective January 1, 2014 [Member]
Dec. 17, 2013
Revolving Credit Facility [Member]
Revolver Loans Second Amendment Portion Effective July 1, 2014 [Member]
Jun. 30, 2014
Revolving Credit Facility [Member]
Revolver Loans [Member]
Line of Credit Facility [Line Items]          
Revolving loans in a collective maximum principal amount     $ 125,000,000 $ 100,000,000 $ 100,000,000
Remaining available borrowing capacity   49,000,000      
Outstanding borrowings under its revolving credit facility $ 35,000,000 $ 35,000,000