Accrued Liabilities (Accrued Liabilities) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Sep. 30, 2018		Dec. 31, 2017	Sep. 30, 2017
Accrued Liabilities
Salaries and other member benefits		$ 61,187	$ 88,643
Warranties		20,156	20,130		$ 13,017	$ 13,597
Interest payable		7,014	18,611
Current portion of acquired contractual obligations and unfavorable contracts	[1]	1,160	1,627
Accrued retirement benefits		3,571	3,571
Current portion of loss reserve on contractual lease commitments		1,245	1,245
Restructuring charges		15,843	16,522
Taxes, other than income		17,290	21,128
Net current contract liabilities	[2]	28,190	9,659
Other		15,481	13,377
Accrued liabilities		$ 171,137	$ 194,513	[3],[4]

[1] In connection with Woodward's acquisition of GE Aviation Systems LLC's (the "Seller") thrust reverser actuation systems business located in Duarte, California (the "Duarte Acquisition") in fiscal year 2013, Woodward assumed current and long-term obligations for contractual commitments that are expected to result in future economic losses. In addition, Woodward assumed current and long-term contractual obligations for services to be provided to the Seller and others, partially offset by current and long-term assets related to contractual payments due from the Seller. The current portion of both obligations is included in Accrued liabilities.

[2] See Note 3, Revenue for more information on net current contract liabilities.

[3] The value of noncash consideration in the form of exchanged products and other customer provided inventory is reflected in unbilled receivables included in "Accounts receivable," "Other assets," and "Inventories," and in contract liabilities, which are included in "Accrued liabilities."

[4] Woodward recorded customer funding of product engineering and development identified as material rights as current and noncurrent deferred revenue contract liabilities included in "Accrued liabilities" and "Other liabilities." The related customer funded product engineering and development costs were capitalized as costs to fulfill a contract, to the extent of the contractually committed customer funded payments, and are recorded as "Other assets."