Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Current assets:
Cash and cash equivalents	$ 64,057	$ 43,805
Accounts receivable, less allowances (2018 - $6,327; 2017 - $9,887)	203,388	210,953
Costs and estimated earnings in excess of billings on uncompleted contracts	76,632	91,180
Inventories	5,152	3,737
Income taxes receivable	3,359	4,042
Other current assets	4,458	4,913
Total current assets	357,046	358,630
Property, plant and equipment, at cost:
Land and buildings	40,424	38,916
Construction equipment	89,036	94,298
Transportation equipment	48,339	48,574
Office equipment and software	41,236	36,556
Construction in progress	1,353	5,952
Total property, plant and equipment - at cost	220,388	224,296
Accumulated depreciation	(147,743)	(144,022)
Property, plant and equipment - net	72,645	80,274
Goodwill	96,162	113,501
Other intangible assets	22,814	26,296
Deferred income taxes	4,848	3,385
Other assets	4,518	3,944
Total assets	558,033	586,030
Current liabilities:
Accounts payable	79,439	105,649
Billings on uncompleted contracts in excess of costs and estimated earnings	120,740	75,127
Accrued wages and benefits	24,375	20,992
Accrued insurance	9,080	9,340
Income taxes payable	7	169
Other accrued expenses	4,824	7,699
Total current liabilities	238,465	218,976
Deferred income taxes	429	128
Borrowings under senior revolving credit facility	0	44,682
Other liabilities	296	435
Total liabilities	239,190	264,221
Commitments and contingencies
Stockholders' equity:
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of June 30, 2018 and June 30, 2017; 26,853,823 and 26,600,562 shares outstanding as of June 30, 2018 and June 30, 2017	279	279
Additional paid-in capital	132,198	128,419
Retained earnings	211,494	222,974
Accumulated other comprehensive loss	(7,411)	(7,324)
Total stockholders' equity before treasury stock	336,560	344,348
Less treasury stock, at cost — 1,034,394 and 1,287,655 shares as of June 30, 2018 and June 30, 2017	(17,717)	(22,539)
Total stockholders' equity	318,843	321,809
Total liabilities and stockholders' equity	$ 558,033	$ 586,030