Employee Benefit Plans, Fair Value of Pension Plan Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Sep. 30, 2016
Level 1 (Quoted Prices in Active Markets) [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[1]	$ 3,568	$ 3,676
Level 1 (Quoted Prices in Active Markets) [Member] | Adept Strategy 9 Fund [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[1]	0	0
Level 1 (Quoted Prices in Active Markets) [Member] | Schroder Matching Plus Nominal and Index Linked Liability Driven Investment Swap Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[1]	0	0
Level 1 (Quoted Prices in Active Markets) [Member] | U.S. Mutual Funds and Fixed Income Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[1]	2,723	2,837
Level 1 (Quoted Prices in Active Markets) [Member] | U.S. Equity Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[1]	414	400
Level 1 (Quoted Prices in Active Markets) [Member] | Cash [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[1]	151	439
Level 2 (Significant Observable Inputs) [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[2]	16,678	18,603
Level 2 (Significant Observable Inputs) [Member] | Adept Strategy 9 Fund [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[2]	11,878	13,268
Level 2 (Significant Observable Inputs) [Member] | Schroder Matching Plus Nominal and Index Linked Liability Driven Investment Swap Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[2]	4,800	5,335
Level 2 (Significant Observable Inputs) [Member] | U.S. Mutual Funds and Fixed Income Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[2]	0	0
Level 2 (Significant Observable Inputs) [Member] | U.S. Equity Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[2]	0	0
Level 2 (Significant Observable Inputs) [Member] | Cash [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[2]	0	0
Level 3 (Unobservable Inputs) [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[3]	0	0
Level 3 (Unobservable Inputs) [Member] | Adept Strategy 9 Fund [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[3]	0	0
Level 3 (Unobservable Inputs) [Member] | Schroder Matching Plus Nominal and Index Linked Liability Driven Investment Swap Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[3]	0	0
Level 3 (Unobservable Inputs) [Member] | U.S. Mutual Funds and Fixed Income Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[3]	0	0
Level 3 (Unobservable Inputs) [Member] | U.S. Equity Funds [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[3]	0	0
Level 3 (Unobservable Inputs) [Member] | Cash [Member]
Fair Value of Plan Assets [Abstract]
Fair value of plan assets	[3]	$ 0	$ 0

[1] Level 1 investments represent mutual funds for which a quoted market price is available on an active market. These investments primarily hold stocks or bonds, or a combination of stocks and bonds.

[2] Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. The Company's pension plan financial assets held in the Adept Strategy 9 Fund and the Schroder investments are Level 2 assets. The Company uses the Net Asset Value to determine the fair value of underlying investments which (a) do not have readily determinable fair value; and (b) prepare their financial statements consistent with the measurement principles of an investment company. The Funds are not exchange traded. The Funds are not subject to any redemption notice periods or restrictions and can be redeemed on a daily basis. No gates or holdbacks or dealing suspensions are being applied to the Funds. The Funds are of perpetual duration.

[3] The Company currently does not have any Level 3 pension plan financial assets.