CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 35,767	$ 82,092
Accounts receivable, net of allowances of $2,393 and $2,441, respectively	443,414	375,353
Contract assets, net of allowances of $486 and $385, respectively	310,429	225,075
Current portion of receivable for insurance claims in excess of deductibles	8,927	11,078
Refundable income taxes	3,572	9,228
Prepaid expenses and other current assets	32,749	45,564
Total current assets	834,858	748,390
Property and equipment, net of accumulated depreciation of $341,461 and $322,128, respectively	217,840	196,092
Operating lease right-of-use assets	31,405	20,971
Goodwill	115,151	66,065
Intangible assets, net of accumulated amortization of $23,208 and $16,779, respectively	89,124	49,054
Receivable for insurance claims in excess of deductibles	34,865	32,443
Investment in joint ventures	3,138	3,978
Other assets	3,575	4,099
Total assets	1,329,956	1,121,092
Current liabilities:
Current portion of long-term debt	5,060	1,039
Current portion of operating lease obligations	9,819	7,765
Current portion of finance lease obligations	1,161	0
Accounts payable	281,708	200,744
Contract liabilities	174,626	167,931
Current portion of accrued self-insurance	24,046	24,242
Accrued income taxes	1,084	2,021
Other current liabilities	87,510	94,857
Total current liabilities	585,014	498,599
Deferred income tax liabilities	37,304	24,620
Long-term debt	80,852	3,464
Accrued self-insurance	52,449	50,816
Operating lease obligations, net of current maturities	21,606	13,230
Finance lease obligations, net of current maturities	2,551	0
Other liabilities	14,303	11,261
Total liabilities	794,079	601,990
Commitments and contingencies
Stockholders’ equity:
Preferred stock—$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at September 30, 2022 and December 31, 2021	0	0
Common stock—$0.01 par value per share; 100,000,000 authorized shares; 16,607,373 and 16,870,636 shares issued and outstanding at September 30, 2022 and December 31, 2021, respectively	166	168
Additional paid-in capital	159,784	163,754
Accumulated other comprehensive income (loss)	(7,599)	173
Retained earnings	383,526	355,007
Total stockholders’ equity	535,877	519,102
Total liabilities and stockholders’ equity	$ 1,329,956	$ 1,121,092