Operating Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 269,357	$ 272,661
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	217,486	224,035
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	44,954	38,342
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,585	2,973
U.K. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 3,332	$ 7,311