Commitments and Contingencies (Tables)

9 Months Ended

Jun. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

The following summarizes the Company’s outstanding borrowings under the Revolver and outstanding letters of credit as of June 30, 2020 and September 30, 2019, respectively.

	June 30, 2020		September 30, 2019
Borrowing availability under the Revolver	$	125,000	$	125,000
Outstanding borrowings under the Revolver	—		—
Outstanding letters of credit under the Revolver	11,872		12,956
Unused amounts under the Revolver	$	113,128	$	112,044
Additional letters of credit under a separate arrangement	$	51	$	204

The following summarizes the Company’s outstanding letters of credit and surety bonds as of June 30, 2020 and September 30, 2019, respectively.

	June 30, 2020		September 30, 2019
Revolving credit capacity	$	45,000	$	45,000
Letters of credit outstanding	11,872		12,956
Remaining revolving credit capacity	$	33,128	$	32,044
Surety capacity	$	230,000	$	220,000
Surety issuances	148,108		144,717
Remaining surety available	$	81,892	$	75,283