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:


	2018		2017
Property, payroll, and other taxes payable	$	22,327,253	$	21,261,924
Salaries, wages, and bonuses payable		29,583,266		28,369,250
Self-insurance liabilities:
Employee group insurance		5,257,120		4,893,855
Workers’ compensation insurance		5,079,514		5,387,235
General liability insurance		3,239,695		3,045,020
Interest		13,397,615		13,175,382
Other		3,240,303		6,319,191
Total accrued expenses and current portion of other long-term liabilities	$	82,124,766	$	82,451,857

Employee insurance expense, including workers’ compensation and medical care benefits, net of employee contributions, totaled $37.7 million, $33.1 million and $34.5 million for fiscal years 2018, 2017 and 2016, respectively.

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


	2018		2017
Advance payments on purchases contracts	$	3,115,106	$	3,185,034
Deferred lease expense		1,941,708		1,913,811
Nonqualified investment plan liability		15,033,318		13,303,318
Self-insurance liabilities:
Workers’ compensation insurance		16,333,768		17,147,541
General liability insurance		4,776,234		4,663,347
Other		2,124,800		1,867,015
Other long-term liabilities		43,324,934		42,080,066
Less current portion		1,166,773		967,518
Total other long-term liabilities	$	42,158,161	$	41,112,548

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.