6. Supplementary Balance Sheet Information

Accrued Expenses and Current Portion of Other Long-Term Liabilities - Accrued expenses and current portion of other long-term liabilities are summarized as follows:



	2019		2018
Property, payroll, and other taxes payable	$	20,273,626	$	22,327,253
Salaries, wages, and bonuses payable		31,861,220		29,583,266
Self-insurance liabilities:
Employee group insurance		5,704,565		5,257,120
Workers’ compensation insurance		4,287,445		5,079,514
General liability insurance		3,154,282		3,239,695
Interest		13,342,260		13,397,615
Other		5,025,885		3,240,303
Total accrued expenses and current portion of other long-term liabilities	$	83,649,283	$	82,124,766

Employee insurance expense, including workers’ compensation and medical care benefits, net of employee contributions, totaled $37.3 million, $37.7 million and $33.1 million for fiscal years 2019, 2018 and 2017, respectively.

Other Long-Term Liabilities - Other long-term liabilities are summarized as follows:



	2019		2018
Advance payments on purchases contracts	$	2,856,569	$	3,115,106
Deferred lease expense		1,949,992		1,941,708
Nonqualified investment plan liability		16,446,037		15,033,318
Self-insurance liabilities:
Workers’ compensation insurance		13,814,615		16,333,768
General liability insurance		4,050,070		4,776,234
Other		3,906,319		2,124,800
Other long-term liabilities		43,023,602		43,324,934
Less current portion		1,133,920		1,166,773
Total other long-term liabilities	$	41,889,682	$	42,158,161

The Company’s fuel operations contain underground tanks for the storage of gasoline and diesel fuel. The Company reviewed FASB Topic ASC 410 and determined we have a legal obligation to remove tanks at a point in the future and accordingly determined we have met the requirements of an asset retirement obligation. The Company followed the FASB ASC 410 model for determining the asset retirement cost and asset retirement obligation. The amounts recorded are immaterial for each fuel center as well as in the aggregate at September 28, 2019 and September 29, 2018.

Advance Payments on Purchases Contracts - The Company has entered into agreements with suppliers whereby payment is received in advance and earned based on purchases of product from these suppliers in the future. The unearned portion, included in other long-term liabilities, will be recognized in the results of operations in accordance with the terms of the contract.