Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Taxes [Line Items]
Effective tax rate	34.90%	29.40%	39.00%
U.S. Federal statutory rate	35.00%	35.00%	35.00%
Deferred taxes on undistributed earnings	$ 53,000	$ 347,000
State and federal net operating loss	13,300,000
Net operating loss valuation allowance	0
Capital loss deferred tax asset	456,000
Unrecognized tax benefits and related interest and penalties expected to reverse within the next	$ 559,000
Capital loss deferred tax asset expiration date	2022
Valuation allowance	$ 456,000
Unremitted earnings of foreign subsidiaries	53,000	347,000
Unrecognized tax benefits that would impact effective tax rate	812,000	1,274,000	$ 1,840,000
Unrecognized tax benefits, related interest and penalties	$ 202,000	$ 316,000
Minimum [Member]
Income Taxes [Line Items]
Net operating loss expiration date	Dec. 31, 2022
Minimum [Member] | State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Statute of limitations on the examination of tax returns	3 years
Minimum [Member] | Foreign Tax Authority [Member]
Income Taxes [Line Items]
Statute of limitations on the examination of tax returns	2 years
Maximum [Member]
Income Taxes [Line Items]
Net operating loss expiration date	Dec. 31, 2037
Maximum [Member] | State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Statute of limitations on the examination of tax returns	4 years
Maximum [Member] | Foreign Tax Authority [Member]
Income Taxes [Line Items]
Statute of limitations on the examination of tax returns	6 years