XML 48 R35.htm IDEA: XBRL DOCUMENT v3.8.0.1
Debt - Additional Information (Detail)
$ in Thousands
 3 Months Ended
Sep. 30, 2017
USD ($)
Rate
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Credit Agreement Terms      
Senior secured revolving credit facility | $ $ 300,000 $ 300,000 $ 250,000
Line Of Credit Facility Expiration Date Feb. 08, 2022    
Senior Leverage Ratio, Maximum 3.00    
Senior Leverage Ratio, Minimum 1.00    
Fixed Charge Coverage Ratio, Maximum 1.25    
Fixed Charge Coverage Ratio, Minimum 1.00    
Amount of Limit on Asset Dispositions | $ $ 20,000    
Additional Margin on alternate base rate loans, Minimum 0.625%    
Additional Margin on alternate base rate loans, Maximum 1.625%    
Sublimit on Australian Dollar, Canadian Dollar, Euro and Pounds Sterling | $ $ 75,000    
Sub-limit on letters of credit under the credit facility | $ $ 200,000    
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Minimum 1.625%    
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Maximum 2.625%    
Additional Margin on Canadian prime rate loans, Minimum 2.125%    
Additional Margin on Canadian prime rate loans, Maximum 3.125%    
Consolidated EBITDA as defined in the Credit Agreement | $ $ 34,000    
Consolidated funded indebtedness | $ $ 50,200    
Dividend Restriction Under Credit Agreement, Percent 100.00%    
Dividend Restriction Under Credit Agreement, Amount | $ $ 30,000    
Minimum [Member]      
Credit Agreement Terms      
Unused Credit Facility Fee 0.25%    
Maximum [Member]      
Credit Agreement Terms      
Unused Credit Facility Fee 0.45%    
Debt Amendment [Member]      
Credit Agreement Terms      
Senior Leverage Ratio, Maximum 4.00    
Senior Leverage Ratio, Minimum 1.00    
Additional Margin on alternate base rate loans, Maximum 1.875%    
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Maximum 2.875%    
Additional Margin on Canadian prime rate loans, Maximum 3.375%    
Minimum Consolidated EBITDA Required | $ $ 15,000    
Restricted Payments Under Credit Amendment | $ $ 5,000    
Leverage Ratio Allowed for Restricted Payments, Maximum 2.50    
Leverage Ratio Allowed for Restricted Payments, Minimum 1.00    
Debt Amendment [Member] | Maximum [Member]      
Credit Agreement Terms      
Unused Credit Facility Fee 0.50%