Commitments and Contingencies (Tables)

3 Months Ended

Dec. 31, 2019

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 December 31, and September 30, 2019, respectively.

	December 31, 2019		September 30, 2019
Borrowing availability under the Revolver	$	125,000	$	125,000
Outstanding borrowings under the Revolver	—		—
Outstanding letters of credit under the Revolver	13,088		12,956
Unused amounts under the Revolver	$	111,912	$	112,044
Additional letters of credit under a separate arrangement	$	194	$	204

The following summarizes the Company’s outstanding letters of credit and surety bonds as of December 31, and September 30, 2019, respectively.

	December 31, 2019		September 30, 2019
Revolving credit capacity	$	45,000	$	45,000
Letters of credit outstanding	13,088		12,956
Remaining revolving credit capacity	$	31,912	$	32,044
Surety capacity	$	230,000	$	220,000
Surety issuances	154,094		144,717
Remaining surety available	$	75,906	$	75,283