Capital stock	3 Months Ended
Mar. 31, 2016
Capital stock	16. Capital stock Share Repurchases In February 2015, the Company’s Board of Directors authorized a program to repurchase up to $250,000 in value of the Company’s common shares. The Company’s share repurchase program does not obligate it to acquire any specific number of shares. Under the program, shares may be purchased in privately negotiated and/or open market transactions, including under plans complying with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. On February 4, 2016, the Company announced that its Board of Directors approved an additional $250 million share repurchase program, bringing the total authorization under the Company’s existing program to $500 million. During the three months ended March 31, 2015 and 2016, the Company purchased 590,713 and 1,356,199 of its common shares, respectively at a weighted average price of $22.51 and $24.35 per share, respectively, for an aggregate cash amount of $13,298 and $33,017, respectively. The purchased shares have been retired. The Company records repurchases of its common shares on the settlement date of each transaction. Shares purchased and retired are deducted to the extent of their par value from common stock and from retained earnings for the excess over par value. Direct costs incurred to acquire the shares are included in the total cost of the shares purchased. For the three months ended March 31, 2015 and 2016, $12 and $27, respectively, was deducted from retained earnings in direct costs related to share repurchases.

Capital stock

3 Months Ended

Mar. 31, 2016

16. Capital stock

Share Repurchases

In February 2015, the Company’s Board of Directors authorized a program to repurchase up to $250,000 in value of the Company’s common shares. The Company’s share repurchase program does not obligate it to acquire any specific number of shares. Under the program, shares may be purchased in privately negotiated and/or open market transactions, including under plans complying with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. On February 4, 2016, the Company announced that its Board of Directors approved an additional $250 million share repurchase program, bringing the total authorization under the Company’s existing program to $500 million. During the three months ended March 31, 2015 and 2016, the Company purchased 590,713 and 1,356,199 of its common shares, respectively at a weighted average price of $22.51 and $24.35 per share, respectively, for an aggregate cash amount of $13,298 and $33,017, respectively. The purchased shares have been retired.

The Company records repurchases of its common shares on the settlement date of each transaction. Shares purchased and retired are deducted to the extent of their par value from common stock and from retained earnings for the excess over par value. Direct costs incurred to acquire the shares are included in the total cost of the shares purchased. For the three months ended March 31, 2015 and 2016, $12 and $27, respectively, was deducted from retained earnings in direct costs related to share repurchases.