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Employee Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summarizes of Company's Non-Vested ESP/EIP Awards | The following table summarizes the status of the Company's non-vested restricted Class A Stock awards under the EIP, ESP and OIP for the year ended December 31, 2016:
| Number of Class A Shares Subject to Restricted Stock Awards |  | Weighted Average Fair Value |  | Remaining Contractual Life
Nonvested at beginning of year | 1,257,558 |  |  | $ | 19.29 |  |  | 1.7 Years |
Granted | 408,207 |  |  | 12.63 |  |  | 3.2 Years |
Vested | (377,011 | ) |  | 19.38 |  |  | — |
Forfeited | (65,221 | ) |  | 17.99 |  |  | — |
Nonvested at end of year | 1,223,533 |  |  | $ | 17.11 |  |  | 2.1 Years |
Schedule of Stock Option Activity | There were 13,601 and 12,027 options outstanding as of December 31, 2016 and 2015, respectively.
Stock Appreciation Rights | The following table summarized the status of the Company's outstanding OARs awards as of December 31, 2016:
Grant Date | Number of OARs Outstanding |  | Strike Price |  | Remaining Contractual Life |  | Fair Value as of December 31, 2016
January 19, 2012 | 305,660 |  |  | $ | 18.94 |  |  | 18 Days |  | $ | 0.25 |
January 14, 2013 | 325,700 |  |  | 15.94 |  |  | 1 Year |  | 4.17 |
January 14, 2014 | 414,070 |  |  | 23.48 |  |  | 2 Years |  | 2.22 |
January 9, 2015 | 467,940 |  |  | 21.94 |  |  | 3 Years |  | 3.08 |
January 6, 2016 | 461,240 |  |  | 15.89 |  |  | 4 Years |  | 5.33 |
| 1,974,610 |  |  |  |  |  |  |
Total weighted average values |  |  | $ | 19.40 |  |  | 2.3 Years |  | $ | 3.17 |

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- Definition Tabular disclosure of the fair value of each stock appreciation rights award estimated using Black-Scholes option pricing model. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average fair value and remaining contractual term for non-vested equity-based payment instruments, excluding stock (or unit) options that were outstanding at the beginning and end of the year, and the number of awards that were granted, vested, forfeited, and expired during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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