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Accumulated other comprehensive income (loss) | 12 Months Ended
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Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated other comprehensive income (loss) | Accumulated Other comprehensive income (loss) AOCI consists of the following balances, net of tax:
| Foreign currency cumulative translation |  | Unrealized gain on cash flow hedges |  | Net change on available-for-sale investments |  | Pension and post-employment actuarial changes |  | Total
Balance, January 1, 2017 | $ | (25,921 | ) |  | $ | 53,740 |  |  | $ | 65 |  |  | $ | (10,833 | ) |  | $ | 17,051 |
OCI (loss) before reclassifications | (21,780 | ) |  | 8,004 |  |  | — |  |  | 600 |  |  | (13,176 | )
Amounts reclassified | — |  |  | (6,378 | ) |  | (65 | ) |  | (224 | ) |  | (6,667 | )
Net current period OCI | (21,780 | ) |  | 1,626 |  |  | (65 | ) |  | 376 |  |  | (19,843 | )
Balance, December 31, 2017 | $ | (47,701 | ) |  | $ | 55,366 |  |  | $ | — |  |  | $ | (10,457 | ) |  | $ | (2,792 | )
Cumulative catch-up adjustment related to adoption of ASU 2018-02 on tax effects in AOCI (note 2(a)) | — |  |  | 11,657 |  |  | — |  |  | (1,032 | ) |  | 10,625 |
OCI before reclassifications | (26,488 | ) |  | 1,567 |  |  | — |  |  | 2,046 |  |  | (22,875 | )
Amounts reclassified | — |  |  | (4,257 | ) |  | — |  | — |  | (86 | ) |  | (4,343 | )
Net current period OCI | $ | (26,488 | ) |  | $ | (2,690 | ) |  | $ | — |  |  | $ | 1,960 |  |  | $ | (27,218 | )
Balance, December 31, 2018 | $ | (74,189 | ) |  | $ | 64,333 |  |  | $ | — |  |  | $ | (9,529 | ) |  | $ | (19,385 | )
Amounts reclassified from AOCI for unrealized gain (loss) on cash flow hedges affected revenue from non-regulated energy sales while those for pension and post-employment actuarial changes affected pension and post-employment non-service costs.

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- References No definition available. + Details
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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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