Long-Term Debt (Narrative - North America) (Details)					3 Months Ended		6 Months Ended	9 Months Ended
	Apr. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Nov. 07, 2016 USD ($)	Jun. 29, 2016 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2017	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)
Line of Credit Facility
Line of credit facility, amount outstanding					$ 89,389,000				$ 74,008,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company
Line of Credit Facility
Line of credit facility, maximum borrowing capacity			$ 195,000,000	$ 275,000,000
Term loan			$ 30,000,000
Leverage ratio in seventh quarter			4.25
Leverage ratio in effect for the eighth quarter and remainder of a credit agreement			3.75
EBITDA required								$ 18,500,000
EBITDA required for seventh quarter		$ 31,000,000
Fixed charge coverage ratio						1.00
Fixed charge coverage ratio after fifth quarter					1.25
Liquidity covenant							$ 25,000,000
Maximum dividends allowed			$ 1,700,000	4,000,000
Loans and advances limit			5,000,000	10,000,000
Maximum asset sales allowed			25,000,000	25,000,000
Carryover of asset sales allowed			$ 15,000,000	$ 15,000,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Euro-rate
Line of Credit Facility
Debt instrument, basis spread on variable rate			3.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Euro-rate | Lowest Tier
Line of Credit Facility
Debt instrument, basis spread on variable rate			2.50%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Base Rate
Line of Credit Facility
Debt instrument, basis spread on variable rate			2.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Base Rate | Lowest Tier
Line of Credit Facility
Debt instrument, basis spread on variable rate			1.50%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility
Line of Credit Facility
Line of credit facility, amount outstanding					$ 250,000
Line of credit facility, current borrowing capacity					$ 105,361,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Subsequent Event
Line of Credit Facility
Line of credit facility, maximum borrowing capacity	$ 140,000,000
Liquidity covenant	$ 25,000,000
Debt instrument term	5 years
Potential increase to borrowing capacity	$ 50,000,000
Maximum growth leverage ratio	3.25
Maximum growth leverage ratio during acquisition period	3.50
Minimum consolidated fixed charge coverage ratio	1.25
Minimum working capital to revolving facility usage ratio	1.40
Acquisition consideration threshold, per acquisition	$ 50,000,000
Aggregate acquisition threshold for four consecutive periods where acquisitions occurred	50,000,000
Aggregate acquisition consideration threshold	100,000,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Subsequent Event | Foreign Sublimit
Line of Credit Facility
Line of credit facility, maximum borrowing capacity	25,000,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Subsequent Event | Term Loan
Line of Credit Facility
Line of credit facility, current borrowing capacity	$ 25,000,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Euro-rate | Subsequent Event
Line of Credit Facility
Debt instrument, basis spread on variable rate	1.00%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Euro-rate | Subsequent Event | Minimum
Line of Credit Facility
Debt instrument, basis spread on variable rate	1.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Euro-rate | Subsequent Event | Maximum
Line of Credit Facility
Debt instrument, basis spread on variable rate	2.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Base Rate | Subsequent Event | Minimum
Line of Credit Facility
Debt instrument, basis spread on variable rate	0.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Base Rate | Subsequent Event | Maximum
Line of Credit Facility
Debt instrument, basis spread on variable rate	1.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | Overnight Bank Funding Rate | Subsequent Event
Line of Credit Facility
Debt instrument, basis spread on variable rate	0.50%