Acquisitions	6 Months Ended
Jun. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Acquisitions	Main Street Power — On February 18, 2015, the Company completed the acquisition of the 100% of the common stock of Main Street Power Company, Inc. for approximately $25 million pursuant to the terms and condition of a definitive agreement dated January 24, 2015. The purchase consideration was comprised of cash of $20 million and the fair value of earn-out payments of $5 million. At June 30, 2015, the assets acquired and liabilities assumed in the acquisition were recorded at provisional amounts based on the preliminary purchase price allocation. The Company is in the process of obtaining additional information to measure all assets acquired and liabilities assumed in the acquisition within the measurement period, which could be up to one year from the date of acquisition. The preliminary purchase price allocation has resulted in the recognition of $14 million of goodwill. Subsequent changes to the fair value of earn-out payments will be reflected in earnings.

Acquisitions

6 Months Ended

Jun. 30, 2015

Discontinued Operations and Disposal Groups [Abstract]

Main Street Power — On February 18, 2015, the Company completed the acquisition of the 100% of the common stock of Main Street Power Company, Inc. for approximately $25 million pursuant to the terms and condition of a definitive agreement dated January 24, 2015. The purchase consideration was comprised of cash of $20 million and the fair value of earn-out payments of $5 million. At June 30, 2015, the assets acquired and liabilities assumed in the acquisition were recorded at provisional amounts based on the preliminary purchase price allocation. The Company is in the process of obtaining additional information to measure all assets acquired and liabilities assumed in the acquisition within the measurement period, which could be up to one year from the date of acquisition. The preliminary purchase price allocation has resulted in the recognition of $14 million of goodwill. Subsequent changes to the fair value of earn-out payments will be reflected in earnings.