Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated revenues	$ 39,857	$ 36,580	$ 37,082	$ 36,681	$ 37,432	$ 39,205	$ 39,094	$ 36,669	$ 150,200	$ 152,400	$ 120,458
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated revenues									116,469	121,519	90,897
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated revenues									21,559	20,245	20,472
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated revenues									$ 12,172	$ 10,636	$ 9,089