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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | The following table summarizes our restricted stock award activity for employees and non-employee directors:
|  | Shares |  | Weighted Average Grant Date Fair Value Per Share
Granted during 2016 |  | 74,376 |  |  | $ | 63.94 |
Vested |  | — |  |  | — |
Forfeited |  | (1,681 | ) |  | 63.94 |
Unvested at December 31, 2016 |  | 72,695 |  |  | $ | 63.94 |
Schedule of cash payments and compensation costs |
|  | Year Ended December 31,
(In thousands) |  | 2016 |  | 2015 |  | 2014
Cash payments for settled shares |  | $ | 278 |  |  | $ | — |  |  | $ | — |
Compensation expense (benefit) |  | 2,098 |  |  | (916 | ) |  | 2,193 |
|  | Year Ended December 31,
(In thousands) |  | 2016 |  | 2015 |  | 2014
Cash payments for settled shares |  | $ | 2,442 |  |  | $ | 1,682 |  |  | $ | 2,401 |
Compensation expense (benefit) |  | 12,694 |  |  | (1,612 | ) |  | 11,249 |
Summary Of The Changes In The Number Of Outstanding Phantom Stock Shares |
|  | Employee Phantom Plans |  | Director Phantom Stock Plan |  | Total
Balance of shares outstanding at December 31, 2015 |  | 519,351 |  |  | 82,253 |  |  | 601,604 |
Granted |  | — |  |  | — |  |  | — |
Settled |  | (1,658 | ) |  | (14,091 | ) |  | (15,749 | )
Forfeited |  | — |  |  | — |  |  | — |
Balance of shares outstanding at December 31, 2016 |  | 517,693 |  |  | 68,162 |  |  | 585,855 |
Schedule of Phantom Stock Liability |
|  | December 31,
(In thousands) |  | 2016 |  | 2015
Employee Phantom Plans |  | $ | 33,116 |  |  | $ | 20,566 |
Director Phantom Stock Plan |  | 5,848 |  |  | 4,698 |
Total |  | $ | 38,964 |  |  | $ | 25,264 |

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- Definition Tabular disclosure of the amount of cash payments and compensation costs related to the exercise of stock options and similar instruments granted under share-based payment arrangements during the period. + References No definition available. + Details
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- Definition Tabular disclosure of the amount of liability as of the balance sheet date related to the exercise of stock options and similar instruments granted under share-based payment arrangements. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + 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=6415400&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 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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