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Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2016
Equity [Abstract] |
Summary of Stock Option Activity and Related Information | A summary of the Company’s stock option activity and related information for the years ended December 31, 2016, 2015, and 2014, are as follows:
| December 31, 2016 |  | December 31, 2015 |  | December 31, 2014
| Options (000’s) # |  | Weighted-Average Exercise Price $ |  | Options (000’s) # |  | Weighted-Average Exercise Price $ |  | Options (000’s) # |  | Weighted-Average Exercise Price $
Outstanding - beginning of year | 2,800 |  |  | 36.84 |  |  | 2,710 |  |  | 36.61 |  |  | 4,237 |  |  | 36.33 |
Granted | 916 |  |  | 9.44 |  |  | 265 |  |  | 43.99 |  |  | 15 |  |  | 56.76 |
Exercised | — |  |  | — |  |  | (36 | ) |  | 33.79 |  |  | (1,528 | ) |  | 36.10 |
Forfeited / expired | (349 | ) |  | 38.97 |  |  | (139 | ) |  | 46.80 |  |  | (14 | ) |  | 28.51 |
Outstanding - end of year | 3,367 |  |  | 29.16 |  |  | 2,800 |  |  | 36.84 |  |  | 2,710 |  |  | 36.61 |
Exercisable - end of year | 2,271 |  |  | 35.89 |  |  | 2,500 |  |  | 36.03 |  |  | 2,508 |  |  | 37.03 |
Non-Vested Stock Option Activity and Related Information | A summary of the Company’s non-vested stock option activity and related information for the years ended December 31, 2016, 2015 and 2014, are as follows:
| December 31, 2016 |  | December 31, 2015 |  | December 31, 2014
| Options (000’s) # |  | Weighted-Average Grant Date Fair Value $ |  | Options (000’s) # |  | Weighted-Average Grant Date Fair Value $ |  | Options (000’s) # |  | Weighted-Average Grant Date Fair Value $
Outstanding non-vested stock options - beginning of year | 300 |  |  | 8.09 |  |  | 202 |  |  | 9.37 |  |  | 389 |  |  | 9.24 |
Granted | 916 |  |  | 3.60 |  |  | 265 |  |  | 7.74 |  |  | 15 |  |  | 11.50 |
Vested | (118 | ) |  | 8.48 |  |  | (167 | ) |  | 9.07 |  |  | (188 | ) |  | 9.30 |
Forfeited | (2 | ) |  | 3.60 |  |  | — |  |  | — |  |  | (14 | ) |  | 9.01 |
Outstanding non-vested stock options - end of year | 1,096 |  |  | 4.30 |  |  | 300 |  |  | 8.09 |  |  | 202 |  |  | 9.37 |
Details Regarding Outstanding and Exercisable Stock Options | Further details regarding the Company’s outstanding and exercisable stock options at December 31, 2016 are as follows:
| Outstanding Options |  | Exercisable Options
Range of Exercise Prices | Options (000’s) # |  | Weighted- Average Remaining Life (Years) |  | Weighted- Average Exercise Price $ |  | Options (000’s) # |  | Weighted- Average Remaining Life (Years) |  | Weighted- Average Exercise Price $
$5.00 – $9.99 | 914 |  |  | 9.2 |  | 9.44 |  |  | — |  |  | 0 |  | — |
$10.00 – $19.99 | 188 |  |  | 2.2 |  | 11.84 |  |  | 188 |  |  | 2.2 |  | 11.84 |
$20.00 – $24.99 | 293 |  |  | 3.2 |  | 24.42 |  |  | 293 |  |  | 3.2 |  | 24.42 |
$25.00 – $29.99 | 364 |  |  | 5.2 |  | 27.69 |  |  | 364 |  |  | 5.2 |  | 27.69 |
$30.00 – $34.99 | 117 |  |  | 5.3 |  | 34.44 |  |  | 117 |  |  | 5.3 |  | 34.44 |
$35.00 – $39.99 | 25 |  |  | 1.6 |  | 39.99 |  |  | 25 |  |  | 1.6 |  | 39.99 |
$40.00 – $44.99 | 1,029 |  |  | 3.0 |  | 41.33 |  |  | 852 |  |  | 1.9 |  | 40.78 |
$50.00 – $54.99 | 422 |  |  | 0.2 |  | 51.40 |  |  | 422 |  |  | 0.2 |  | 51.40 |
$55.00 – $59.99 | 15 |  |  | 7.2 |  | 56.76 |  |  | 10 |  |  | 7.2 |  | 56.76 |
| 3,367 |  |  | 4.61 |  | 29.16 |  |  | 2,271 |  |  | 2.49 |  | 35.89 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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