CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 174,034	$ 157,551
Short term investments	3,179	3,441
Customer retention deposits and restricted cash	15,377	35,377
Accounts receivable, net	284,497	268,095
Costs and estimated earnings in excess of billings	80,434	41,701
Inventory and uninstalled contract materials	43,616	37,193
Deferred tax assets	10,477	10,477
Prepaid expenses and other current assets	12,830	10,800
Total current assets	624,444	564,635
Property and equipment, net	220,179	184,840
Investment in non-consolidated entities	6,546	12,813
Intangible assets, net	48,002	51,978
Goodwill	118,626	116,941
Other long-term assets	1,214
Total assets	1,019,011	931,207
Current liabilities:
Accounts payable	119,882	151,546
Billings in excess of costs and estimated earnings	147,464	158,892
Accrued expenses and other current liabilities	101,881	76,152
Dividends payable	1,805
Current portion of capital leases	3,928	3,733
Current portion of long-term debt	26,910	19,446
Current portion of contingent earnout liabilities	8,763	10,900
Total current liabilities	410,633	420,669
Long-term capital leases, net of current portion	2,760	3,831
Long-term debt, net of current portion	188,713	128,367
Deferred tax liabilities	20,018	20,018
Long-term contingent earnout liabilities, net of current portion	6,083	12,531
Other long-term liabilities	13,243	13,153
Total liabilities	641,450	598,569
Commitments and contingencies
Stockholders' equity
Common stock-$.0001 par value, 90,000,000 shares authorized, 51,571,394 and 51,403,686 issued and outstanding at September 30, 2013 and December 31, 2012	5	5
Additional paid-in capital	159,058	155,605
Retained earnings	217,540	175,517
Noncontrolling interests	958	1,511
Total stockholders' equity	377,561	332,638
Total liabilities and stockholders' equity	$ 1,019,011	$ 931,207