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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 85,970 | $ 139,465
Short-term investments |  | 30,992
Customer retention deposits and restricted cash | 1,385 | 481
Accounts receivable, net | 318,513 | 337,382
Costs and estimated earnings in excess of billings | 109,537 | 68,654
Inventory and uninstalled contract materials | 65,248 | 58,116
Deferred tax assets | 13,555 | 13,555
Prepaid expenses and other current assets | 32,488 | 31,720
Total current assets | 626,696 | 680,365
Property and equipment, net | 286,275 | 271,431
Intangible assets, net | 39,860 | 39,581
Goodwill | 124,562 | 119,410
Other long-term assets | 2,200 | 400
Total assets | 1,079,593 | 1,111,187
Current liabilities: |  |
Accounts payable | 129,892 | 128,793
Billings in excess of costs and estimated earnings | 138,176 | 158,595
Accrued expenses and other current liabilities | 85,960 | 83,401
Dividends payable | 2,841 | 2,062
Current portion of capital leases | 1,319 | 1,650
Current portion of long-term debt | 41,249 | 38,909
Current portion of contingent earnout liabilities | 737 | 5,901
Total current liabilities | 400,174 | 419,311
Long-term capital leases, net of current portion | 274 | 657
Long-term debt, net of current portion | 192,054 | 204,029
Deferred tax liabilities | 19,484 | 19,484
Long-term contingent earnout liabilities, net of current portion | 1,075 | 1,021
Other long-term liabilities | 9,852 | 12,899
Total liabilities | $ 622,913 | $ 657,401
Commitments and contingencies |  |
Stockholders' equity |  |
Common stock-$.0001 par value, 90,000,000 shares authorized, 51,665,821 and 51,561,396 issued and outstanding at June 30, 2015 and December 31, 2014 | $ 5 | $ 5
Additional paid-in capital | 162,624 | 160,186
Retained earnings | 294,030 | 293,628
Noncontrolling interests | 21 | (33)
Total stockholders' equity | 456,680 | 453,786
Total liabilities and stockholders' equity | $ 1,079,593 | $ 1,111,187

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 27 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 7 + Details
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