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Equity and Cash Incentive Program (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Shares available for grant | 17,000,000 |  |
Vesting period (in years) | 3 years |  |
Award term | 10 years |  |
Additional Disclosures [Abstract] |  |  |
Tax benefit from the exercise of share-based awards | $ 14,759 | $ 8,365 | $ 4,964
Stock-based compensation expense [Abstract] |  |  |
Pre-tax compensation expense | 23,698 | 24,073 | 18,650
Tax benefit | (2,722) | (8,411) | (6,579)
Total stock-based compensation expense, net of tax | $ 20,976 | $ 15,662 | $ 12,071
Shares Granted to Directors [Abstract] |  |  |
Aggregate shares granted | 15,802 | 16,231 | 21,023
Shares deferred | (9,917) | (11,337) | (11,882)
Net shares granted | 5,885 | 4,894 | 9,141
Stock Appreciation Rights (SARs) [Member] |  |  |
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Additional awards issued due to modification | 1,138,008 |  |
Risk-free interest rate (in hundredths) |  | 1.80% | 1.05%
Dividend yield (in hundredths) |  | 2.27% | 3.09%
Expected life (in years) |  | 4 years 7 months 6 days | 4 years 7 months 6 days
Volatility (in hundredths) |  | 21.90% | 26.17%
Grant price | $ 81.43 | $ 66.85 | $ 48.28
Fair value on date of grant |  | $ 10.65 | $ 7.80
Awards Outstanding [Roll Forward] |  |  |
Awards Outstanding (in number of shares) | 5,329,204 | 6,573,979 |
Awards Granted (in number of shares) | 757,603 | 1,028,116 | 1,346,354
Surrendered upon spin-off | (210,119) |  |
Modification upon spin-off | 1,138,008 |  |
Awards Forfeit and Expired (in number of shares) | (438,014) |  |
Awards Exercised (in number of shares) | (2,492,253) |  |
Awards Exercisable (in number of shares) | 2,661,980 |  |
Awards Outstanding, Weighted Average Exercise Price [Roll Forward] |  |  |
Awards Outstanding, Weighted Average Exercise Price | $ 60.19 | $ 62.78 |
share-based compensation, grants surrendered upon spin-off, weighted average exercise price | 68.36 | $ 0 |
Awards Forfeit and Expired, Weighted Average Exercise Price | 68.76 |  |
Awards Exercised, Weighted Average Exercise Price | 47.17 |  |
Awards Exercisable, Weighted Average Exercise Price | $ 57.26 |  |
Additional Disclosures [Abstract] |  |  |
Awards Outstanding, Weighted Average Remaining Contractual Term | 6 years 2 months 12 days |  |
Awards Exercisable, Weighted Average Remaining Contractual Term | 4 years 6 months |  |
Fair value of stock appreciation rights which became exerciable during the year | $ 12,832 | $ 16,006 | $ 24,843
Awards Exercised, Total Intrinsic Value | 101,365 | $ 44,646 | $ 34,916
Unrecognized Compensation Cost [Abstract] |  |  |
Unrecognized Compensation Expense | $ 8,315 |  |
Unrecognized Compensation Expense, Period for Recognition | 1 year 9 months 18 days |  |
Performance Shares [Member] |  |  |
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Additional awards issued due to modification | 26,316 |  |
Grant price | $ 80.30 |  |
Fair value on date of grant |  | $ 66.85 | $ 48.28
Awards Outstanding [Roll Forward] |  |  |
Surrendered upon spin-off | (10,683) |  |
Modification upon spin-off | 26,316 |  |
Awards Outstanding, Weighted Average Exercise Price [Roll Forward] |  |  |
share-based compensation, grants surrendered upon spin-off, weighted average exercise price | $ 67.39 |  |
Awards Forfeit and Expired, Weighted Average Exercise Price | $ 67.88 |  |
Unvested Awards [Roll Forward] |  |  |
Awards Unvested (in number of shares) | 144,957 | 124,467 |
Awards Granted (in number of shares) | 122,459 | 57,958 | 79,561
Awards Forfeit (in number of shares) | (57,015) |  |
Awards Vested (in number of shares) | (60,587) |  |
Unvested Awards, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
share-based compensation, additional grants due to modification, weighted average exercise price | $ 0 |  |
Awards Unvested, Weighted Average Grant Date Fair Value | 76.99 | $ 65.80 |
Awards Vested, Weighted Average Grant Date Fair Value | $ 48.27 |  |
Unrecognized Compensation Cost [Abstract] |  |  |
Unrecognized Compensation Expense | $ 21,603 |  |
Unrecognized Compensation Expense, Period for Recognition | 1 year 10 months 24 days |  |
Shares Granted to Directors [Abstract] |  |  |
Performance Share Attainment | 285.39% | 280.00% | 34.61%
Restricted Stock Units (RSUs) [Member] |  |  |
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Additional awards issued due to modification | 47,063 |  |
Fair value on date of grant | $ 80.59 |  |
Awards Outstanding [Roll Forward] |  |  |
Surrendered upon spin-off | (26,762) |  |
Modification upon spin-off | 47,063 |  |
Awards Outstanding, Weighted Average Exercise Price [Roll Forward] |  |  |
share-based compensation, grants surrendered upon spin-off, weighted average exercise price | $ 70.21 |  |
Unvested Awards [Roll Forward] |  |  |
Awards Unvested (in number of shares) | 390,481 | 333,886 |
Awards Granted (in number of shares) | 284,721 | 174,203 | 249,263
Awards Forfeit (in number of shares) | (58,436) |  |
Awards Vested (in number of shares) | (189,991) |  |
Unvested Awards, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
share-based compensation, additional grants due to modification, weighted average exercise price | $ 0 |  |
Awards Unvested, Weighted Average Grant Date Fair Value | 73.35 | $ 70.06 |
Awards Forfeit, Weighted Average Grant Date Fair Value | 69.66 |  |
Awards Vested, Weighted Average Grant Date Fair Value | $ 70.06 |  |
Unrecognized Compensation Cost [Abstract] |  |  |
Unrecognized Compensation Expense | $ 18,987 |  |
Unrecognized Compensation Expense, Period for Recognition | 1 year 10 months 24 days |  |
Additional Paid-in Capital [Member] |  |  |
Additional Disclosures [Abstract] |  |  |
Tax benefit from the exercise of share-based awards |  |  | $ 4,964
Minimum [Member] | Stock Appreciation Rights (SARs) [Member] |  |  |
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Risk-free interest rate (in hundredths) | 2.58% |  |
Dividend yield (in hundredths) | 1.99% |  |
Expected life (in years) | 5 years 7 months 6 days |  |
Volatility (in hundredths) | 20.95% |  |
Grant price | $ 79.75 |  |
Fair value on date of grant | 14.58 |  |
Minimum [Member] | Performance Shares [Member] |  |  |
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Fair value on date of grant | $ 79.75 |  |
Maximum [Member] | Stock Appreciation Rights (SARs) [Member] |  |  |
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Risk-free interest rate (in hundredths) | 2.87% |  |
Dividend yield (in hundredths) | 2.43% |  |
Expected life (in years) | 5 years 8 months 12 days |  |
Volatility (in hundredths) | 21.20% |  |
Grant price | $ 82.09 |  |
Fair value on date of grant | 15.41 |  |
Maximum [Member] | Performance Shares [Member] |  |  |
Awards Granted, Fair Value Assumptions and Methodology [Abstract] |  |  |
Fair value on date of grant | $ 82.09 |  |
Discontinued Operations [Member] |  |  |
Stock-based compensation expense [Abstract] |  |  |
Pre-tax compensation expense | $ 744 | $ 2,454 | $ 2,366

X
- Definition Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109245112&loc=d3e23524-113945 + Details
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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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