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Debt (Details Textual)
 3 Months Ended 12 Months Ended
Sep. 30, 2017
Jun. 30, 2017
USD ($)
Rate
Dec. 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
Debt (Textual) [Abstract]        
Senior revolving credit facility | $   $ 300,000,000 $ 250,000,000 $ 200,000,000
Line of Credit Facility, Expiration Date   Feb. 08, 2022    
Leverage Ratio, Maximum   3.00    
Leverage Ratio, Minimum   1.00    
Fixed Charge Coverage Ratio, Maximum   1.25    
Fixed Charge Coverage Ratio, Minimum   1.00    
Limit on asset dispositions | $   $ 20.0    
Sublimit on Australian Dollar, Canadian Dollar, Euro and Pounds Sterling | $   75.0    
Sublimit on letters of credit under the credit facility | $   $ 200.0    
Additional Margin on alternate base rate loans, Minimum   0.625%    
Additional Margin on alternate base rate loans, Maximum   1.625%    
Line Of Credit Basis Spread On Adjusted LIBO, EURIBO and CDOR Minimum   1.625%    
Line Of Credit Basis Spread On Adjusted LIBO, EURIBO and CDOR Maximum   2.625%    
Line Of Credit Basis Spread On Canadian Prime Rate Minimum   2.125%    
Line Of Credit Basis Spread On Canadian Prime Rate Maximum   3.125%    
Maximum limit of consolidated funded indebtedness   3.0    
Consolidated EBITDA as defined in the Credit Agreement | $   $ 43,600,000    
Consolidated Funded Indebtedness | $   $ 52,500,000    
Subsequent Events [Abstract]        
Subsequent Event, Description
Subsequent Event

On August 31, 2017, the Company entered in to an amendment to its Credit Agreement, which provided the following:

•
The maximum permitted Leverage Ratio was temporarily increased to 4.00 to 1.00 for the quarters ending September 30, 2017, and December 31, 2017. The maximum Leverage Ratio will revert back to 3.00 to 1.00 beginning with the quarter ending March 31, 2018.

•
The Fixed Charge Coverage Ratio will not be tested for the quarters ending September 30, 2017 and December 31, 2017, but will be in effect and tested quarterly thereafter beginning with the quarter ending March 31, 2018.
  
•
A new minimum Consolidated EBITDA covenant was added solely for the four-quarter period ending December 31, 2017. For this period, the Company is required to achieve Consolidated EBITDA of $15.0 million.

•
The Restricted Payments covenant was amended to restrict cash dividends and share repurchases during the period beginning August 31, 2017 and ending December 31, 2017 to an aggregate basket of $5.0 million. In addition, during such period, both cash dividends and share repurchases are prohibited unless the pro forma Leverage Ratio is less than or equal to 2.50 to 1.00. Thereafter, the restriction reverts back to limiting cash dividends to 50% of net income for each fiscal year, and limiting share repurchases to $30.0 million per calendar year.

•
An additional increased pricing tier was added for the "Covenant Relief Period" beginning on August 31, 2017 and ending on the date we deliver our financial statements and compliance certificate for the fiscal quarter ending December 31, 2017. If our Leverage Ratio as of any quarterly calculation date during the Covenant Relief Period exceeds 3.00 to 1.00: (1) the Applicable Margin on ABR loans will be 1.875%; (2) the Applicable Margin for Adjusted LIBO, EURIBO and CDOR will be 2.875%; (3) the Applicable Margin for Canadian Prime Rate loans will be 3.375%; and (4) the unused credit facility fee will be 0.50%.
      
Minimum [Member]        
Debt (Textual) [Abstract]        
Unused Credit Facility Fee   0.25%    
Maximum [Member]        
Debt (Textual) [Abstract]        
Unused Credit Facility Fee   0.45%