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Share-Based Compensation Level 1 (Notes) | 12 Months Ended
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Dec. 31, 2016
Share-based Compensation [Abstract] |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | Share-Based Compensation Stock Benefit Plans We maintain benefit plans whereby shares of our common stock may be issued pursuant to the exercise of stock options or restricted stock granted to officers and key employees. Our Amended and Restated Incentive Plan reserves 44,000,000 shares of common stock for outstanding and future awards of stock options, restricted stock, and other stock based awards to officers and key employees. In May 2016, our shareholders approved the 2016 Equity Incentive Plan that reserves 13,000,000 shares of common stock for outstanding and future awards of stock options, restricted stock, and other awards to officers and key employees. Our benefit plans allow for options to be granted as either non-qualified or incentive stock options. The options historically have been granted annually, or upon hire, as approved by the Compensation Committee of the Board of Directors. The options are granted with an exercise price equal to the market price of our common stock on the date of the grant, as approved by the Compensation Committee of the Board of Directors. The options are generally exercisable at a rate of 33 1/3% each year unless alternative vesting methods are approved by the Compensation Committee of the Board of Directors. Restricted stock awards are generally expensed ratably over the period during which the restrictions lapse. At December 31, 2016 and 2015, 12,171,075 and 1,531,410 shares, respectively, were reserved for future option and restricted stock grants under our stock benefit plans. We utilize the Black-Scholes option valuation model for estimating the fair value of our stock options. This model allows the use of a range of assumptions related to volatility, risk-free interest rate, expected holding period, and dividend yield. The expected volatility utilized in the valuation model is based on the historical volatility of our stock price. The dividend yield and expected holding period are based on historical experience and management’s estimate of future events. The risk-free interest rate is derived from the U.S. Treasury yield curve based on the expected life of the option in effect at the time of grant. The fair values of our stock options are calculated using the following weighted average assumptions, based on the methods described above for the years ended December 31:
Assumptions |  | 2016 |  | 2015 |  | 2014
Dividend yield |  | 2.0 | % |  | 1.8 | % |  | 1.8 | %
Expected volatility |  | 19.7 | % |  | 23.3 | % |  | 27.1 | %
Risk-free interest rate |  | 1.0 | % |  | 1.3 | % |  | 1.1 | %
Expected holding period (years) |  | 4.0 |  |  | 4.0 |  |  | 4.0 |
The following table summarizes certain information with respect to stock option and restricted share compensation as included in our Consolidated Statement of Operations for the years ended December 31:
| 2016 |  | 2015 |  | 2014
| (In thousands)
Total pretax employee share-based compensation expense included in net income | $ | 14,056 |  |  | $ | 13,843 |  |  | $ | 13,127 |
Income tax benefit related to share-based compensation included in net income | $ | 6,427 |  |  | $ | 5,068 |  |  | $ | 7,368 |
We realized windfall tax deductions of $34.0 million, $43.5 million, and $31.6 million in excess of previously recorded tax benefits, based on the option and restricted share value at the time of grant for the years ended December 31, 2016, 2015, and 2014, respectively. The additional tax benefit associated with the windfall is not recognized until the deduction reduces taxes payable. Stock Options The following table sets forth stock option activity for the year ended December 31, 2016: (Shares reported in whole numbers)
| Options |  | Weighted-Average Exercise Price
Outstanding at December 31, 2015 | 11,047,920 |  |  | $ | 13.98 |
Granted | 1,863,700 |  |  | $ | 22.28 |
Exercised | (2,108,212 | ) |  | $ | 8.38 |
Canceled | (28,272 | ) |  | $ | 20.98 |
Outstanding at December 31, 2016 | 10,775,136 |  |  | $ | 16.49 |
Exercisable at December 31, 2016 | 6,938,591 |  |  | $ | 13.69 |
The aggregate intrinsic value for stock options outstanding and exercisable was $128.3 million and $102.1 million, respectively, at December 31, 2016. Set forth below is certain information related to stock options outstanding and exercisable at December 31, 2016: (Shares reported in whole numbers)
|  | Options Outstanding |  | Options Exercisable
Range of Exercise Price |  | Number Outstanding at December 31, 2016 |  | Weighted-Average Remaining Contractual Life (in years) |  | Weighted- Average Exercise Price |  | Number Exercisable at December 31, 2016 |  | Weighted- Average Exercise Price
$ 5.00 — 10.00 |  | 2,032,763 |  |  | 1.7 |  | $ | 8.42 |  |  | 2,032,763 |  |  | $ | 8.42 |
$10.01 — 15.00 |  | 1,361,450 |  |  | 3.1 |  | $ | 11.18 |  |  | 1,361,450 |  |  | $ | 11.18 |
$15.01 — 20.00 |  | 3,548,915 |  |  | 4.7 |  | $ | 16.50 |  |  | 2,801,293 |  |  | $ | 16.26 |
$20.01 — 25.00 |  | 3,832,008 |  |  | 6.6 |  | $ | 22.65 |  |  | 743,085 |  |  | $ | 22.97 |
$ 5.00 — 25.00 |  | 10,775,136 |  |  | 4.6 |  | $ | 16.49 |  |  | 6,938,591 |  |  | $ | 13.69 |
Other information pertaining to stock option activity during the years ended December 31 is as follows:
| 2016 |  | 2015 |  | 2014
Weighted average grant-date fair value of stock options granted | $ | 4.01 |  |  | $ | 3.79 |  |  | $ | 3.34 |
Total fair value of stock options vested (in thousands) | $ | 7,690 |  |  | $ | 7,973 |  |  | $ | 6,814 |
Total intrinsic value of stock options exercised (in thousands) | $ | 37,284 |  |  | $ | 52,513 |  |  | $ | 42,048 |
For the years ended December 31, 2016, 2015, and 2014, cash received from the exercise of stock options was $17.7 million, $31.8 million, and $32.4 million, respectively. We recognized compensation expense of $7.6 million, $7.9 million, and $7.5 million related to stock options for the years ended December 31, 2016, 2015, and 2014, respectively. As of December 31, 2016, the unrecognized compensation expense related to stock options of $8.1 million is expected to be recognized over a weighted average period of 1.3 years. Restricted Shares Restricted share award activity was as follows: (Shares reported in whole numbers)
| Restricted Share Awards |  | Weighted-Average Grant-Date Fair Value
Nonvested restricted share awards at December 31, 2015 | 573,739 |  |  | $ | 19.32 |
Granted | 241,510 |  |  | $ | 22.28 |
Vested | (313,247 | ) |  | $ | 18.14 |
Forfeited and other | (1,258 | ) |  | $ | 20.85 |
Nonvested restricted share awards at December 31, 2016 | 500,744 |  |  | $ | 21.48 |
The fair value of our restricted share units, as determined on the grant date, is being amortized and charged to income (with an offsetting credit to Capital in excess of par value) generally over the average period during which the restrictions lapse. At December 31, 2016, unrecognized compensation expense of $5.8 million related to restricted share awards, which is recorded in Capital in excess of par value on our Consolidated Balance Sheet, is expected to be recognized over a weighted average period of 1.7 years. We recognized compensation expense of $5.6 million, $5.9 million, and $5.7 million during the years ended December 31, 2016, 2015, and 2014, respectively, related to our restricted share awards.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68057994&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: 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=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 + Details
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