Derivative Financial Instruments (Schedule of Outstanding Derivative Financial Instruments) (Details) € in Thousands, £ in Thousands, $ in Thousands	Sep. 30, 2018 USD ($)		Sep. 30, 2018 GBP (£)		Sep. 30, 2018 EUR (€)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 150,000
Fair Value	$ 94
Float Rate	2.18%		2.18%		2.18%
Fix Rate	1.80%		1.80%		1.80%
Interest Rate Swap One [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 150,000	[1]
Fair Value	$ 913	[1]
Fix Rate	2.09%	[1]	2.09%	[1]	2.09%	[1]
Interest Rate Swap Two [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 150,000	[2]
Fair Value	$ 1,235	[2]
Fix Rate	2.24%	[2]	2.24%	[2]	2.24%	[2]
Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional Amount | £			£ 700
Fair Value | £			£ (94)
Forward Contracts One [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 9,500
Fair Value	$ (17)
Forward Contracts Two [Member]
Derivatives, Fair Value [Line Items]
Notional Amount | €					€ 200
Fair Value | €					€ 6

[1] This swap represents a forward contract and will be effective in November 2018.

[2] This swap represents a forward contract and will be effective in November 2019.