CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 3,363	$ 39,797
Accounts receivable, net of allowances of $317 and $376, respectively	161,910	187,235
Costs and estimated earnings in excess of billings on uncompleted contracts	67,181	51,486
Receivable for insurance claims in excess of deductibles	12,999	11,290
Refundable income taxes	1,727	5,617
Other current assets	6,778	7,942
Total current assets	253,958	303,367
Property and equipment, net of accumulated depreciation of $196,831 and $181,575, respectively	156,216	160,678
Goodwill	46,781	47,124
Intangible assets, net of accumulated amortization of $4,301 and $3,798, respectively	11,205	11,362
Other assets	3,515	2,394
Total assets	471,675	524,925
Current liabilities:
Current maturities of long-term debt, including capital leases	888	0
Accounts payable	77,467	73,300
Billings in excess of costs and estimated earnings on uncompleted contracts	44,056	40,614
Accrued self insurance	37,782	36,967
Other current liabilities	26,943	28,856
Total current liabilities	187,136	179,737
Deferred income tax liabilities	14,325	14,382
Long-term debt, including capital leases, net of current maturities	23,665	0
Other liabilities	862	926
Total liabilities	225,988	195,045
Commitments and contingencies
Stockholders' equity:
Preferred stock—$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at June 30, 2016 and December 31, 2015	0	0
Common stock—$0.01 par value per share; 100,000,000 authorized shares; 16,201,793 and 19,969,347 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	160	198
Additional paid-in capital	132,431	161,342
Accumulated other comprehensive income	32	116
Retained earnings	113,064	168,224
Total stockholders' equity	245,687	329,880
Total liabilities and stockholders' equity	$ 471,675	$ 524,925

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.