Ameresco, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Business Segment Information - Segment Information (Details)

Business Segment Information - Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 181,061us-gaap_SalesRevenueNet	$ 168,891us-gaap_SalesRevenueNet	$ 142,558us-gaap_SalesRevenueNet	$ 100,731us-gaap_SalesRevenueNet	$ 176,134us-gaap_SalesRevenueNet	$ 161,648us-gaap_SalesRevenueNet	$ 126,253us-gaap_SalesRevenueNet	$ 110,136us-gaap_SalesRevenueNet	$ 593,241us-gaap_SalesRevenueNet	$ 574,171us-gaap_SalesRevenueNet	$ 631,171us-gaap_SalesRevenueNet
Unallocated corporate activity									6,292	2,759	24,607
Net income	8,654us-gaap_NetIncomeLoss	7,291us-gaap_NetIncomeLoss	2,719us-gaap_NetIncomeLoss	(8,281)us-gaap_NetIncomeLoss	1,574us-gaap_NetIncomeLoss	4,545us-gaap_NetIncomeLoss	(1,781)us-gaap_NetIncomeLoss	(1,924)us-gaap_NetIncomeLoss	10,383us-gaap_NetIncomeLoss	2,414us-gaap_NetIncomeLoss	18,360us-gaap_NetIncomeLoss
U.S. Regions
Segment Reporting Information [Line Items]
Revenues									274,338	314,339	382,118
Interest income									0	0	0
Interest expense									0	0	0
Depreciation and intangible asset amortization									1,308	2,071	3,909
Unallocated corporate activity									0
Net income									25,846	22,408	44,361
U.S. Federal
Segment Reporting Information [Line Items]
Revenues									99,986	70,452	73,469
Interest income									0	0	122
Interest expense									0	0	0
Depreciation and intangible asset amortization									1,178	1,053	991
Unallocated corporate activity									0
Net income									10,489	6,430	2,263
Canada
Segment Reporting Information [Line Items]
Revenues									70,492	68,797	60,564
Interest income									1	46	8
Interest expense									1,369	1,367	719
Depreciation and intangible asset amortization									1,288	1,687	1,133
Unallocated corporate activity									0
Net income									(7,838)	(3,043)	(4,179)
Small-Scale Infrastructure
Segment Reporting Information [Line Items]
Revenues									52,037	40,388	37,979
Interest income									43	65	1
Interest expense									3,188	2,045	3,429
Depreciation and intangible asset amortization									12,858	10,478	9,033
Unallocated corporate activity									0
Net income									6,090	4,365	2,031
Other
Segment Reporting Information [Line Items]
Revenues									96,388	80,195	77,041
Interest income									1	2	0
Interest expense									0	0	36
Depreciation and intangible asset amortization									4,275	3,145	2,722
Unallocated corporate activity									0
Net income									(208)	(1,281)	1,322
Consolidated Entities
Segment Reporting Information [Line Items]
Revenues									593,241	574,171	631,171
Interest income									45	113	131
Interest expense									4,557	3,412	4,184
Depreciation and intangible asset amortization									20,907	18,434	17,788
Unallocated corporate activity									(28,087)	(26,120)	(21,191)
Net income									$ 34,379	$ 28,879	$ 45,798