Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Current assets:
Cash and cash equivalents	$ 63,750	$ 39,726
Accounts receivable, less allowances (2013 - $795; 2012 - $1,201)	140,840	108,034
Costs and estimated earnings in excess of billings on uncompleted contracts	73,773	68,562
Inventories	2,988	2,482
Income taxes receivable	3,032	0
Deferred income taxes	5,657	6,024
Other current assets	6,234	5,688
Total current assets	296,274	230,516
Property, plant and equipment, at cost:
Land and buildings	29,649	28,846
Construction equipment	69,998	59,176
Transportation equipment	34,366	25,865
Office equipment and software	18,426	16,892
Construction in progress	9,080	2,910
Property, plant and equipment at cost, gross	161,519	133,689
Accumulated depreciation	(90,218)	(78,814)
Property, plant and equipment at cost, net	71,301	54,875
Goodwill	30,836	28,675
Other intangible assets	7,551	6,504
Other assets	4,016	2,565
Total assets	409,978	323,135
Current liabilities:
Accounts payable	68,961	48,931
Billings on uncompleted contracts in excess of costs and estimated earnings	62,848	30,293
Accrued wages and benefits	21,919	15,298
Accrued insurance	7,599	6,912
Income taxes payable	0	1,115
Other accrued expenses	3,039	3,414
Total current liabilities	164,366	105,963
Deferred income taxes	7,450	6,075
Commitments and contingencies
Stockholders' equity:
Common stock - $.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of June 30, 2013 and June 30, 2012	279	279
Additional paid-in capital	118,190	116,693
Retained earnings	141,427	117,419
Accumulated other comprehensive income	227	771
Total stockholders' equity before treasury stock	260,123	235,162
Less treasury stock, at cost - 1,779,593 and 2,141,990 shares as of June 30, 2013 and June 30, 2012	(21,961)	(24,065)
Total stockholders' equity	238,162	211,097
Total liabilities and stockholders' equity	$ 409,978	$ 323,135