CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 141,527	$ 157,551
Short term investments	3,179	3,441
Customer retention deposits and restricted cash	27,371	35,377
Accounts receivable, net	249,621	268,095
Costs and estimated earnings in excess of billings	48,164	41,701
Inventory and uninstalled contract materials	37,917	37,193
Deferred tax assets	10,477	10,477
Prepaid expenses and other current assets	10,810	10,800
Total current assets	529,066	564,635
Property and equipment, net	195,258	184,840
Investment in non-consolidated entities	13,082	12,813
Intangible assets, net	50,984	51,978
Goodwill	118,964	116,941
Other long-term assets	1,181
Total assets	908,535	931,207
Current liabilities:
Accounts payable	105,876	151,546
Billings in excess of costs and estimated earnings	160,944	158,892
Accrued expenses and other current liabilities	75,996	76,152
Dividends payable	1,547
Current portion of capital leases	4,273	3,733
Current portion of long-term debt	20,944	19,446
Current portion of contingent earnout liabilities	18,728	10,900
Total current liabilities	388,308	420,669
Long-term capital leases, net of current portion	3,469	3,831
Long-term debt, net of current portion	136,764	128,367
Deferred tax liabilities	20,018	20,018
Long-term contingent earnout liabilities, net of current portion	5,897	12,531
Other long-term liabilities	9,913	13,153
Total liabilities	564,369	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 March 31, 2013 and December 31, 2012	5	5
Additional paid-in capital	158,639	155,605
Retained earnings	183,741	175,517
Noncontrolling interests	1,781	1,511
Total stockholders' equity	344,166	332,638
Total liabilities and stockholders' equity	$ 908,535	$ 931,207