Related Party Transactions	12 Months Ended
Dec. 31, 2012
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions MasTec leases employees to a customer, in which Jorge Mas and Jose Mas own a minority interest. For the years ended December 31, 2012, 2011 and 2010, MasTec charged approximately $527,000, $480,000, and $463,000 respectively, to the customer. As of December 31, 2012 and 2011, receivables of $907,000 and $860,000, respectively, attributable to this arrangement were outstanding. The Company also provides satellite communication services to this customer. For the years ended December 31, 2012, 2011 and 2010, revenues relating to this customer were approximately $1,214,000, $1,123,000 and $979,000, respectively. As of December 31, 2012 and 2011, receivables from this arrangement of approximately $1,232,000 and $775,000, respectively, were outstanding. The Company charters an aircraft from a third party which leases two of its aircraft from entities in which Jorge Mas and Jose Mas have an ownership interest. MasTec paid this unrelated chartering company approximately $2,000, $66,000 and $560,000 for the years ended December 31, 2012, 2011 and 2010, respectively. MasTec leases a property located in Florida from Irma S. Mas, the mother of Jorge Mas and Jose Mas. For the year ended December 31, 2012, the Company paid lease payments of approximately $44,000 in connection with this property. For each of the two years in the period ended December 31, 2011, the Company paid lease payments of approximately $48,000 in connection with this property. MasTec purchases, rents and leases equipment used in its business from a number of different vendors on a non-exclusive basis, including Neff Corp. (“Neff”). Juan Carlos Mas, who was the chairman of the Neff Board of Directors through September 30, 2010, is the brother of Jorge Mas, Chairman of MasTec’s Board of Directors, and Jose Mas, MasTec’s Chief Executive Officer. For the nine months ended September 30, 2010, MasTec paid Neff approximately $859,000 for equipment purchases, rentals and leases. As of October 1, 2010, Juan Carlos Mas was no longer serving on the Neff Board of Directors. Split Dollar and Deferred Bonus Agreements MasTec has a split dollar agreement with Jorge Mas. Under this agreement, MasTec is the sole owner and beneficiary of each of the policies subject to the agreement and upon the death of the insured or insureds under the applicable policy, MasTec is entitled to receive a portion of the death benefit under such policy equal to the greater of (i) the total premiums paid by MasTec on such policy, or (ii) the then cash value of such policy immediately before the death of the insured or insureds, excluding surrender charges. Upon termination of the agreement, Jorge Mas, or in the case of a second to die policy, the second to die of Jorge Mas and his wife have an option to purchase each policy subject to the agreement for a purchase price equal to the greater of the amounts referenced above. The total maximum face amount of the insurance for all policies subject to the split dollar agreement was capped at $200 million. MasTec will make the premium payments until the agreement is terminated, which occurs upon any of the following events: (i) bankruptcy or dissolution of MasTec, or (ii) a change in control of MasTec. In connection with the split dollar agreements for Jorge Mas, MasTec paid approximately $284,000 for each of the three years in the period ended December 31, 2012. MasTec also has a deferred bonus agreement with Jorge Mas. Under this agreement, which is triggered upon a change in control of MasTec, the deferred bonus is equal to the sum of the following amounts, determined with respect to each policy subject to the split dollar agreement: the greater of (i) the total premiums paid by MasTec under such policy, or (ii) the then cash value of such policy immediately prior to the change in control, excluding surrender charges. MasTec also has a split dollar agreement and a deferred bonus agreement with Jose Mas. The split dollar agreement provides that one or more life insurance policies may be subject to the agreement. At this time, however, the only policy subject to the agreement is the one acquired pursuant to the original agreement, which is in an aggregate face amount of $11 million. MasTec is the sole owner and beneficiary of any policy subject to the agreement, and upon the death of the insured, MasTec is entitled to receive a portion of the death benefit equal to the greater of (i) the total premiums paid by MasTec on such policy, or (ii) the then cash value of such policy immediately before the death of the insured, excluding surrender charges. Upon termination of the agreement, Jose Mas has an option to purchase each policy, subject to the agreement for a purchase price equal to the greater of the amounts referenced above. MasTec will make the premium payments until the agreement is terminated, which occurs upon any of the following events: (i) bankruptcy or dissolution of MasTec, or (ii) a change in control of MasTec. For the years ended December 31, 2012 and 2011, MasTec did not make any payments in connection with the split dollar agreement for Jose Mas. For the year ended December 31, 2010, MasTec paid approximately $115,000 in connection with the split dollar agreement for Jose Mas. The amount of deferred bonus that is payable upon termination of the split dollar agreement, which is triggered upon a change in control of MasTec, is equal to the sum of the following amounts, determined with respect to each policy subject to the split dollar agreement: the greater of (i) the total premiums paid by MasTec under the terms of such policy, or (ii) the then cash value of such policy immediately prior to the change in control, excluding surrender charges. The Company adjusts the value of life insurance policies associated with the split dollar agreements each period based on their current cash surrender values. The estimated fair value of these life insurance policies of $8.7 million and $7.9 million as of December 31, 2012 and 2011, respectively, is included in other assets in the consolidated balance sheets.

Related Party Transactions

MasTec leases employees to a customer, in which Jorge Mas and Jose Mas own a minority interest. For the years ended December 31, 2012, 2011 and 2010, MasTec charged approximately $527,000, $480,000, and $463,000 respectively, to the customer. As of December 31, 2012 and 2011, receivables of $907,000 and $860,000, respectively, attributable to this arrangement were outstanding. The Company also provides satellite communication services to this customer. For the years ended December 31, 2012, 2011 and 2010, revenues relating to this customer were approximately $1,214,000, $1,123,000 and $979,000, respectively. As of December 31, 2012 and 2011, receivables from this arrangement of approximately $1,232,000 and $775,000, respectively, were outstanding.

The Company charters an aircraft from a third party which leases two of its aircraft from entities in which Jorge Mas and Jose Mas have an ownership interest. MasTec paid this unrelated chartering company approximately $2,000, $66,000 and $560,000 for the years ended December 31, 2012, 2011 and 2010, respectively.

MasTec leases a property located in Florida from Irma S. Mas, the mother of Jorge Mas and Jose Mas. For the year ended December 31, 2012, the Company paid lease payments of approximately $44,000 in connection with this property. For each of the two years in the period ended December 31, 2011, the Company paid lease payments of approximately $48,000 in connection with this property.

MasTec purchases, rents and leases equipment used in its business from a number of different vendors on a non-exclusive basis, including Neff Corp. (“Neff”). Juan Carlos Mas, who was the chairman of the Neff Board of Directors through September 30, 2010, is the brother of Jorge Mas, Chairman of MasTec’s Board of Directors, and Jose Mas, MasTec’s Chief Executive Officer. For the nine months ended September 30, 2010, MasTec paid Neff approximately $859,000 for equipment purchases, rentals and leases. As of October 1, 2010, Juan Carlos Mas was no longer serving on the Neff Board of Directors.

Split Dollar and Deferred Bonus Agreements

MasTec has a split dollar agreement with Jorge Mas. Under this agreement, MasTec is the sole owner and beneficiary of each of the policies subject to the agreement and upon the death of the insured or insureds under the applicable policy, MasTec is entitled to receive a portion of the death benefit under such policy equal to the greater of (i) the total premiums paid by MasTec on such policy, or (ii) the then cash value of such policy immediately before the death of the insured or insureds, excluding surrender charges. Upon termination of the agreement, Jorge Mas, or in the case of a second to die policy, the second to die of Jorge Mas and his wife have an option to purchase each policy subject to the agreement for a purchase price equal to the greater of the amounts referenced above. The total maximum face amount of the insurance for all policies subject to the split dollar agreement was capped at $200 million. MasTec will make the premium payments until the agreement is terminated, which occurs upon any of the following events: (i) bankruptcy or dissolution of MasTec, or (ii) a change in control of MasTec. In connection with the split dollar agreements for Jorge Mas, MasTec paid approximately $284,000 for each of the three years in the period ended December 31, 2012.

MasTec also has a deferred bonus agreement with Jorge Mas. Under this agreement, which is triggered upon a change in control of MasTec, the deferred bonus is equal to the sum of the following amounts, determined with respect to each policy subject to the split dollar agreement: the greater of (i) the total premiums paid by MasTec under such policy, or (ii) the then cash value of such policy immediately prior to the change in control, excluding surrender charges.

MasTec also has a split dollar agreement and a deferred bonus agreement with Jose Mas. The split dollar agreement provides that one or more life insurance policies may be subject to the agreement. At this time, however, the only policy subject to the agreement is the one acquired pursuant to the original agreement, which is in an aggregate face amount of $11 million. MasTec is the sole owner and beneficiary of any policy subject to the agreement, and upon the death of the insured, MasTec is entitled to receive a portion of the death benefit equal to the greater of (i) the total premiums paid by MasTec on such policy, or (ii) the then cash value of such policy immediately before the death of the insured, excluding surrender charges. Upon termination of the agreement, Jose Mas has an option to purchase each policy, subject to the agreement for a purchase price equal to the greater of the amounts referenced above. MasTec will make the premium payments until the agreement is terminated, which occurs upon any of the following events: (i) bankruptcy or dissolution of MasTec, or (ii) a change in control of MasTec. For the years ended December 31, 2012 and 2011, MasTec did not make any payments in connection with the split dollar agreement for Jose Mas. For the year ended December 31, 2010, MasTec paid approximately $115,000 in connection with the split dollar agreement for Jose Mas.

The amount of deferred bonus that is payable upon termination of the split dollar agreement, which is triggered upon a change in control of MasTec, is equal to the sum of the following amounts, determined with respect to each policy subject to the split dollar agreement: the greater of (i) the total premiums paid by MasTec under the terms of such policy, or (ii) the then cash value of such policy immediately prior to the change in control, excluding surrender charges.

The Company adjusts the value of life insurance policies associated with the split dollar agreements each period based on their current cash surrender values. The estimated fair value of these life insurance policies of $8.7 million and $7.9 million as of December 31, 2012 and 2011, respectively, is included in other assets in the consolidated balance sheets.