Accumulated other  Share capital  Contributed  comprehensive [note 7(a)] surplus Defi cit  income (loss)  Total [in thousands of Canadian dollars] $ $ $ $ $ Balance, December 31, 2011  1,964,334  20,059  (362,377)   (1,831)   1,620,185 Comprehensive income   —  —  352,163  2,001  354,164  Dividends declared  [note 8]  —  —  (271,912)   — (271,912) Shares repurchased   (9,534)   —  (21,000)   — (30,534) Issuance of share capital on exercise of options  9,633  (9,434)   —  —  199 Compensation expense for equity-based plans   —  3,886  —  —  3,886  Change during the year  99  (5,548)  59,251  2,001  55,803  Balance, December 31, 2012  1,964,433 14,511 (303,126)  170 1,675,988 Balance, December 31, 2010   1,984,488  21,846  (440,404)   144  1,566,074 Comprehensive income   —  —  376,899  (1,975)   374,924 Dividends declared  [note 8]  —  —  (236,407)   — (236,407) Shares repurchased   (32,729)  —   (62,465)   — (95,194)  Issuance of share capital on exercise of options  and vesting of deferred equity units  12,575  (8,787)   —  —  3,788 Compensation expense for equity-based plans   —  7,000  —  —  7,000 Change during the year   (20,154)   (1,787)   78,027  (1,975)   54,111 Balance, December 31, 2011  1,964,334 20,059 (362,377)  (1,831)  1,620,185 (see accompanying notes) Consolidated Statements  OF CHANGES IN SHAREHOLDERS’ EQUITY  For the years ended December 31 51