Acquisitions	12 Months Ended
Dec. 31, 2015
Acquisitions
Acquisitions	4. Acquisitions Acquisition of DynaTen On May 1, 2014, we closed a transaction to acquire DynaTen Corporation ("DynaTen") which reports as a separate operating unit in Northern Texas. DynaTen is a regional mechanical contractor based in Fort Worth, Texas that engages in a broad range of mechanical contracting projects, HVAC services and controls, in the Dallas/Fort Worth metroplex and in surrounding areas. The total purchase price, which was finalized in the first quarter of 2015, was $40.5 million, of which $19.8 million was allocated to goodwill. Other Acquisitions We completed various other acquisitions in 2015 and 2014, which were not material, individually or in the aggregate, and were "tucked-in" with existing operations. The total purchase price for the "tucked-in" acquisitions, including earn-outs, was $8.3 million in 2015 and $15.4 million in 2014. No acquisitions were completed in 2013. One of the "tucked-in" acquisitions was completed on the last day of the fourth quarter of 2015 with cash funding occurring in early January 2016. Our consolidated balance sheet includes preliminary allocations of the purchase price to the assets acquired and liabilities assumed for this acquisition pending the completion of the final valuation of intangible assets and purchase price adjustments. The results of operations of acquisitions are included in our consolidated financial statements from their respective acquisition dates. Additional contingent purchase price ("earn-out") has been or will be paid if certain acquisitions achieve predetermined profitability targets. Such earn-outs are not subject to the continued employment of the sellers.

Acquisitions

12 Months Ended

Dec. 31, 2015

4. Acquisitions

Acquisition of DynaTen

On May 1, 2014, we closed a transaction to acquire DynaTen Corporation ("DynaTen") which reports as a separate operating unit in Northern Texas. DynaTen is a regional mechanical contractor based in Fort Worth, Texas that engages in a broad range of mechanical contracting projects, HVAC services and controls, in the Dallas/Fort Worth metroplex and in surrounding areas. The total purchase price, which was finalized in the first quarter of 2015, was $40.5 million, of which $19.8 million was allocated to goodwill.

Other Acquisitions

We completed various other acquisitions in 2015 and 2014, which were not material, individually or in the aggregate, and were "tucked-in" with existing operations. The total purchase price for the "tucked-in" acquisitions, including earn-outs, was $8.3 million in 2015 and $15.4 million in 2014. No acquisitions were completed in 2013. One of the "tucked-in" acquisitions was completed on the last day of the fourth quarter of 2015 with cash funding occurring in early January 2016. Our consolidated balance sheet includes preliminary allocations of the purchase price to the assets acquired and liabilities assumed for this acquisition pending the completion of the final valuation of intangible assets and purchase price adjustments. The results of operations of acquisitions are included in our consolidated financial statements from their respective acquisition dates. Additional contingent purchase price ("earn-out") has been or will be paid if certain acquisitions achieve predetermined profitability targets. Such earn-outs are not subject to the continued employment of the sellers.