Fair Value Measurements (Details) (Recurring basis, USD $) In Thousands	Sep. 30, 2011
Fair Value
(Liabilities) assets at fair value
Nonqualified deferred compensation	$ (1,834)
Designated derivatives	463
Non-designated derivatives	(686)
Contingent consideration for acquisition of business	(84,300)
Level 1
(Liabilities) assets at fair value
Nonqualified deferred compensation	(1,834)
Level 2
(Liabilities) assets at fair value
Designated derivatives	463
Non-designated derivatives	(686)
Level 3
(Liabilities) assets at fair value
Contingent consideration for acquisition of business	$ (84,300)