CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 113,777	$ 157,551
Short-term investments	3,428	3,441
Customer retention deposits and restricted cash	27,503	35,377
Accounts receivable, net	251,092	268,095
Costs and estimated earnings in excess of billings	70,288	41,701
Inventory and uninstalled contract materials	38,339	37,193
Deferred tax assets	10,477	10,477
Prepaid expenses and other current assets	12,719	10,800
Total current assets	527,623	564,635
Property and equipment, net	215,659	184,840
Investment in non-consolidated entities	12,724	12,813
Intangible assets, net	49,893	51,978
Goodwill	118,028	116,941
Other long-term assets	1,158
Total assets	925,085	931,207
Current liabilities:
Accounts payable	102,026	151,546
Billings in excess of costs and estimated earnings	162,570	158,892
Accrued expenses and other current liabilities	80,349	76,152
Dividends payable	1,805
Current portion of capital leases	4,335	3,733
Current portion of long-term debt	21,967	19,446
Current portion of contingent earnout liabilities	8,048	10,900
Total current liabilities	381,100	420,669
Long-term capital leases, net of current portion	3,584	3,831
Long-term debt, net of current portion	144,546	128,367
Deferred tax liabilities	20,018	20,018
Long-term contingent earnout liabilities, net of current portion	5,924	12,531
Other long-term liabilities	11,568	13,153
Total liabilities	566,740	598,569
Commitments and contingencies
Stockholders' equity
Common stock-$.0001 par value, 90,000,000 shares authorized, 51,562,284 and 51,403,686 issued and outstanding at June 30, 2013 and December 31, 2012	5	5
Additional paid-in capital	158,730	155,605
Retained earnings	197,500	175,517
Noncontrolling interests	2,110	1,511
Total stockholders' equity	358,345	332,638
Total liabilities and stockholders' equity	$ 925,085	$ 931,207