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Segmented information | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Segmented information | Segmented information In connection with the acquisition of Empire on January 1, 2017, the Company aligned its management reporting under two primary North American business units consisting of the Liberty Power Group and the Liberty Utilities Group. The two business units are the two segments of the Company. The Liberty Power Group owns and operates a diversified portfolio of non-regulated renewable and thermal electric generation utility assets; the Liberty Utilities Group owns and operates a portfolio of regulated electric, natural gas, water distribution and wastewater collection utility systems and transmission operations. For purposes of evaluating divisional performance, the Company allocates the realized portion of any gains or losses on financial instruments to specific divisions. The unrealized portion of any gains or losses on derivative instruments not designated in a hedging relationship is not considered in management’s evaluation of divisional performance and is therefore allocated and reported in the corporate segment. The results of operations and assets for these segments are reflected in the tables below. The comparative information for 2016 has been reclassified to conform with the composition of the reporting segments presented in the current year.
| Year ended December 31, 2017
| Liberty Power Group |  | Liberty Utilities Group |  | Corporate |  | Total
Revenue | $ | 300,173 |  |  | $ | 1,677,636 |  |  | $ | — |  |  | $ | 1,977,809 |
Fuel, power and water purchased | 25,384 |  |  | 485,016 |  |  | — |  |  | 510,400 |
Net revenue | 274,789 |  |  | 1,192,620 |  |  | — |  |  | 1,467,409 |
Operating expenses | 86,675 |  |  | 511,983 |  |  | — |  |  | 598,658 |
Administrative expenses | 20,777 |  |  | 42,900 |  |  | 789 |  |  | 64,466 |
Depreciation and amortization | 103,038 |  |  | 222,088 |  |  | 1,321 |  |  | 326,447 |
Gain on foreign exchange | — |  |  | — |  |  | 373 |  |  | 373 |
Operating income | 64,299 |  |  | 415,649 |  |  | (2,483 | ) |  | 477,465 |
Interest expense | 47,565 |  |  | 126,790 |  |  | 28,276 |  |  | 202,631 |
Interest, dividend, equity and other income | (3,723 | ) |  | (5,449 | ) |  | (2,817 | ) |  | (11,989 | )
Other expenses (gain) | 2,282 |  |  | (4,250 | ) |  | 62,751 |  |  | 60,783 |
Earnings (loss) before income taxes | $ | 18,175 |  |  | $ | 298,558 |  |  | $ | (90,693 | ) |  | $ | 226,040 |
Property, plant and equipment | $ | 2,818,697 |  |  | $ | 5,047,454 |  |  | $ | 43,342 |  |  | $ | 7,909,493 |
Equity-method investees | 37,273 |  |  | 2,784 |  |  | 422 |  |  | 40,479 |
Total assets | 3,103,999 |  |  | 7,299,576 |  |  | 130,060 |  |  | 10,533,635 |
Capital expenditures | 211,328 |  |  | 528,695 |  |  | — |  |  | 740,023 |
22. | Segmented information (continued)
| Year ended December 31, 2016
| Liberty Power Group |  | Liberty Utilities Group |  | Corporate |  | Total
Revenue | $ | 265,949 |  |  | $ | 830,069 |  |  | $ | — |  |  | $ | 1,096,018 |
Fuel and power purchased | 21,260 |  |  | 274,055 |  |  | — |  |  | 295,315 |
Net revenue | 244,689 |  |  | 556,014 |  |  | — |  |  | 800,703 |
Operating expenses | 72,346 |  |  | 260,595 |  |  | 60 |  |  | 333,001 |
Administrative expenses | 19,656 |  |  | 26,272 |  |  | 421 |  |  | 46,349 |
Depreciation and amortization | 80,094 |  |  | 105,448 |  |  | 1,357 |  |  | 186,899 |
Gain on foreign exchange | — |  |  | — |  |  | (436 | ) |  | (436 | )
Operating income | 72,593 |  |  | 163,699 |  |  | (1,402 | ) |  | 234,890 |
Interest expense | 21,847 |  |  | 50,671 |  |  | 59,074 |  |  | 131,592 |
Interest, dividend and other income | 32 |  |  | (5,282 | ) |  | (5,323 | ) |  | (10,573 | )
Other expense (gain) | (14,403 | ) |  | (11,690 | ) |  | 10,454 |  |  | (15,639 | )
Earnings (loss) before income taxes | $ | 65,117 |  |  | $ | 130,000 |  |  | $ | (65,607 | ) |  | $ | 129,510 |
Property, plant and equipment | $ | 2,455,336 |  |  | $ | 2,390,047 |  |  | $ | 44,563 |  |  | $ | 4,889,946 |
Equity-method investees | 59,021 |  |  | 2,314 |  |  | 3,084 |  |  | 64,419 |
Total assets | 2,771,651 |  |  | 5,388,966 |  |  | 88,843 |  |  | 8,249,460 |
Capital expenditures | 141,420 |  |  | 264,323 |  |  | — |  |  | 405,743 |
The majority of non-regulated energy sales are earned from contracts with large public utilities. The Company has mitigated its credit risk to the extent possible by selling energy to large utilities in various North American locations. None of the utilities contribute more than 10% of total revenue. APUC operates in the independent power and utility industries in both Canada and the United States. Information on operations by geographic area is as follows:
| 2017 |  | 2016
Revenue |  |  |
Canada | $ | 95,326 |  |  | $ | 100,403 |
United States | 1,882,483 |  |  | 995,615 |
| $ | 1,977,809 |  |  | $ | 1,096,018 |
Property, plant and equipment |  |  |
Canada | $ | 568,693 |  |  | $ | 558,271 |
United States | 7,340,800 |  |  | 4,331,675 |
| $ | 7,909,493 |  |  | $ | 4,889,946 |
Intangible assets |  |  |
Canada | $ | 34,654 |  |  | $ | 36,611 |
United States | 29,454 |  |  | 28,378 |
| $ | 64,108 |  |  | $ | 64,989 |
Revenue is attributed to the two countries based on the location of the underlying generating and utility facilities.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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