XML 60 R47.htm IDEA: XBRL DOCUMENT v3.5.0.2
Debt - Other - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Jul. 31, 2016
Dec. 31, 2015
Oct. 31, 2011
Interest Rate Swap [Member]              
Debt Instrument [Line Items]              
Hedge ineffectiveness and income statement effect in period $ 0 $ 0 $ 0 $ 0      
Other assets, collateral 400,000   400,000     $ 1,700,000  
Interest Rate Swap [Member] | 2006 Senior Unsecured Notes [Member]              
Debt Instrument [Line Items]              
Unsecured debt, current         $ 65,000,000   $ 60,000,000
Interest Rate Contract [Member] | 2006 Senior Unsecured Notes [Member]              
Debt Instrument [Line Items]              
Fair value of the interest rate swaps $ 400,000   $ 400,000     $ 2,900,000  
Interest Rate Contract Two [Member] | 2006 Senior Unsecured Notes [Member]              
Debt Instrument [Line Items]              
Maturity date of interest rate swap     2016-10        
Fixed interest rate             5.675%