CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 139,465	$ 196,077
Short-term investments	30,992	18,686
Customer retention deposits and restricted cash	481	5,304
Accounts receivable, net	337,382	304,955
Costs and estimated earnings in excess of billings	68,654	57,146
Inventory and uninstalled contract materials	58,116	51,829
Deferred tax assets	13,555	13,133
Prepaid expenses and other current assets	31,720	12,654
Total current assets	680,365	659,784
Property and equipment, net	271,431	226,512
Intangible assets, net	39,581	45,303
Goodwill	119,410	118,626
Other long-term assets	400	468
Total assets	1,111,187	1,050,693
Current liabilities:
Accounts payable	128,793	127,302
Billings in excess of costs and estimated earnings	158,595	173,365
Accrued expenses and other current liabilities	83,401	91,079
Dividends payable	2,062	1,805
Current portion of capital leases	1,650	3,288
Current portion of long-term debt	38,909	28,475
Current portion of contingent earnout liabilities	5,901	5,000
Total current liabilities	419,311	430,314
Long-term capital leases, net of current portion	657	2,295
Long-term debt, net of current portion	204,029	191,051
Deferred tax liabilities	19,484	10,092
Long-term contingent earnout liabilities, net of current portion	1,021	4,233
Other long-term liabilities	12,899	14,260
Total liabilities	657,401	652,245
Commitments and contingencies
Stockholders' equity
Preferred stock-$.0001 par value, 1,000,000 shares authorized, none issued and outstanding at December 31, 2014 and 2013
Common stock-$.0001 par value; 90,000,000 shares authorized, 51,561,396 and 51,571,394 issued and outstanding at December 30, 2014 and December 31, 2013	5	5
Additional paid-in capital	160,186	159,196
Retained earnings	293,628	238,216
Noncontrolling interests	(33)	1,031
Total stockholders' equity	453,786	398,448
Total liabilities and stockholders' equity	$ 1,111,187	$ 1,050,693