Condensed Unaudited Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 109,247	$ 26,382
Accounts receivable, net of allowance	902,426	877,131
Inventories	70,395	83,939
Current deferred tax assets, net	9,945	3,276
Prepaid expenses and deposits	28,678	30,550
Other current assets	4,967	7,496
Current assets of discontinued operations	20,091	18,591
Total current assets	1,145,749	1,047,365
Property and equipment, net	383,174	350,378
Goodwill	824,014	824,707
Other intangible assets, net	132,885	137,100
Available for sale auction rate securities	14,767	14,408
Other assets	32,607	31,013
Long-term assets of discontinued operations	7,670	7,648
Total assets	2,540,866	2,412,619
Current liabilities:
Current maturities of long-term debt	49,284	52,596
Accounts payable	360,649	398,713
Accrued salaries and wages	43,129	31,368
Accrued taxes payable	22,473	17,488
Accrued insurance	20,526	21,754
Other accrued expenses	12,685	11,548
Acquisition-related contingent consideration, current	33,300	19,216
Billings in excess of costs and earnings	104,601	123,435
Other current liabilities	42,574	29,699
Current liabilities of discontinued operations	2,508	4,569
Total current liabilities	691,729	710,386
Acquisition-related contingent consideration, net of current portion	116,179	135,712
Long-term debt	685,390	546,323
Long-term deferred tax liabilities, net	122,597	119,388
Other liabilities	39,316	38,875
Total liabilities	1,655,211	1,550,684
Commitments and contingencies (See Note 17)
Shareholders' equity:
Preferred stock, $1.00 par value; authorized shares - 5,000,000; issued and outstanding shares - none	0	0
Common stock, $0.10 par value; authorized shares - 145,000,000; issued shares - 86,256,387 and 85,915,552 as of March 31, 2013 and December 31, 2012, respectively	8,626	8,592
Capital surplus	809,082	803,166
Retained earnings	219,285	200,915
Accumulated other comprehensive loss	(6,104)	(5,501)
Treasury stock, at cost; 9,467,286 shares as of both March 31, 2013 and December 31, 2012	(150,000)	(150,000)
Total MasTec, Inc. shareholders' equity	880,889	857,172
Non-controlling interests	4,766	4,763
Total shareholders' equity	885,655	861,935
Total liabilities and shareholders' equity	$ 2,540,866	$ 2,412,619