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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Schedule of stock option activity and related information |
|  | Years Ended December 31, |
|  | 2015 |  | 2014 |  | 2013 |
|  | Options |  | Weighted Average Exercise Price |  | Weighted Average Intrinsic Value |  | Options |  | Weighted Average Exercise Price |  | Options |  | Weighted Average Exercise Price |
|  | (Options in thousands) |
Outstanding at beginning of year |  |  | 495 |  | $ | 47.34 |  |  |  |  |  | 1,029 |  | $ | 41.66 |  |  | 1,064 |  | $ | 33.37 |
Granted |  |  | — |  |  | — |  |  |  |  |  | 114 |  |  | 57.58 |  |  | 379 |  |  | 54.78 |
Cancelled/Forfeitures |  |  | (69 | ) |  | 51.66 |  |  |  |  |  | (306 | ) |  | 44.19 |  |  | (53 | ) |  | 36.97 |
Exercised |  |  | (64 | ) |  | 36.29 |  |  |  |  |  | (342 | ) |  | 36.48 |  |  | (361 | ) |  | 31.73 |
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Outstanding at end of year |  |  | 362 |  | $ | 48.46 |  | $ | 5.29 |  |  | 495 |  | $ | 47.34 |  |  | 1,029 |  | $ | 41.66 |
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Exercisable at end of year |  |  | 192 |  | $ | 45.10 |  | $ | 7.74 |  |  | 128 |  | $ | 40.04 |  |  | 249 |  | $ | 32.35 |
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Schedule of information about options outstanding | The following table summarizes information about options outstanding at December 31, 2015:
|  | Options Outstanding |  | Options Exercisable |
Range of Exercise Prices |  | Number Outstanding |  | Weighted Average Remaining Contractual Life (years) |  | Weighted Average Exercise Price |  | Number Exercisable |  | Weighted Average Exercise Price |
|  | (Options in thousands) |
$26.34–$37.41 |  |  | 125 |  |  | 5.88 |  | $ | 34.56 |  |  | 91 |  | $ | 33.48 |
$40.17–$47.21 |  |  | 3 |  |  | 5.74 |  |  | 41.34 |  |  | 2 |  |  | 42.18 |
$54.76–$54.76 |  |  | 136 |  |  | 7.18 |  |  | 54.76 |  |  | 64 |  |  | 54.76 |
$57.47–$60.10 |  |  | 98 |  |  | 8.36 |  |  | 57.66 |  |  | 35 |  |  | 57.65 |
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|  |  | 362 |  |  | 7.04 |  | $ | 48.46 |  |  | 192 |  | $ | 45.10 |
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Schedule of weighted average assumptions used to estimate the grant-date fair value of share issued under the 2004 Stock Incentive Plan |
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |
Expected life (years) |  |  | 6.0 |  |  | 6.0 |
Expected stock price volatility |  |  | 37.5 | % |  | 40.3 | %
Expected dividend yield |  |  | 1.0 | % |  | 1.0 | %
Risk-free interest rate |  |  | 1.9 | % |  | 1.7 | %
Schedule of nonvested restricted stock and deferred shares activity and related information |
|  | Years Ended December 31, |
|  | 2015 |  | 2014 |  | 2013 |
|  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |
|  | (Shares in thousands) |
Unvested at beginning of year |  |  | 214 |  | $ | 53.74 |  |  | 260 |  | $ | 45.58 |  |  | 237 |  | $ | 35.45 |
Granted |  |  | 180 |  |  | 50.87 |  |  | 151 |  |  | 56.79 |  |  | 142 |  |  | 54.80 |
Cancelled/Forfeitures |  |  | (28 | ) |  | 53.99 |  |  | (95 | ) |  | 46.83 |  |  | (16 | ) |  | 37.44 |
Vested |  |  | (122 | ) |  | 51.72 |  |  | (102 | ) |  | 44.87 |  |  | (103 | ) |  | 35.25 |
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Unvested at end of year |  |  | 244 |  | $ | 52.61 |  |  | 214 |  | $ | 53.74 |  |  | 260 |  | $ | 45.58 |
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Schedule of the Company's RSU activity and related information |
|  | Years Ended December 31, |
|  | 2015 |  | 2014 |  | 2013 |
|  | RSUs |  | Weighted Average Purchase Price |  | Weighted Average Intrinsic Value |  | RSUs |  | Weighted Average Purchase Price |  | RSUs |  | Weighted Average Purchase Price |
|  | (RSU's in thousands) |
Outstanding at beginning of period |  |  | 80 |  | $ | 32.08 |  |  |  |  |  | 132 |  | $ | 27.46 |  |  | 196 |  | $ | 22.88 |
Granted |  |  | 60 |  |  | 37.13 |  |  |  |  |  | 31 |  |  | 40.27 |  |  | 45 |  |  | 31.63 |
Cancelled/Forfeitures |  |  | (9 | ) |  | 36.92 |  |  |  |  |  | (32 | ) |  | 31.58 |  |  | (14 | ) |  | 28.35 |
Settled |  |  | (30 | ) |  | 27.10 |  |  |  |  |  | (51 | ) |  | 25.41 |  |  | (95 | ) |  | 19.19 |
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Outstanding at end of period |  |  | 101 |  | $ | 36.14 |  |  |  |  | $ | 80 |  | $ | 32.08 |  |  | 132 |  | $ | 27.46 |
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Vested at end of period |  |  | 25 |  | $ | 33.35 |  |  |  |  | $ | 31 |  | $ | 27.96 |  |  | 42 |  | $ | 25.30 |
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Schedule of information about RSUs outstanding | The following table summarizes information about RSUs outstanding at December 31, 2015:
|  | RSUs Outstanding |  | RSUs Vested |
Range of Purchase Prices |  | Number Outstanding |  | Weighted Average Purchase Price |  | Number Vested |  | Weighted Average Purchase Price |
|  | (RSUs in thousands) |
$19.87–$25.15 |  |  | 1 |  | $ | 25.15 |  |  | 1 |  | $ | 25.15 |
$26.51–$31.63 |  |  | 26 |  |  | 31.43 |  |  | 18 |  |  | 31.35 |
$37.13–$40.27 |  |  | 74 |  |  | 37.92 |  |  | 6 |  |  | 40.27 |
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|  |  | 101 |  | $ | 36.14 |  |  | 25 |  | $ | 33.35 |
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Schedule of weighted average assumptions used to estimate the grant-date fair value of restricted stock units |
|  | Years Ended December 31, |
|  | 2015 |  | 2014 |  | 2013 |
Expected life (years) |  |  | 3.0 |  |  | 3.0 |  |  | 3.0 |
Expected stock price volatility |  |  | 23.4 | % |  | 31.2 | % |  | 34.1 | %
Expected dividend yield |  |  | 1.2 | % |  | 0.9 | % |  | 0.9 | %
Risk-free interest rate |  |  | 1.1 | % |  | 0.7 | % |  | 0.4 | %
Performance stock units |
Schedule of unvested performance shares activity and related information |
|  | Years Ended December 31, |
|  | 2015 |  | 2014 |
|  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |
|  | (Shares in thousands) |
Unvested at beginning of year |  |  | 107 |  | $ | 56.97 |  |  | — |  |  |  |
Granted |  |  | 106 |  |  | 58.94 |  |  | 117 |  | $ | 57.02 |
Cancelled/Forfeitures |  |  | (12 | ) |  | 57.51 |  |  | (10 | ) |  | 57.47 |
Vested |  |  | — |  |  |  |  |  | — |  |  |  |
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Unvested at end of year |  |  | 201 |  | $ | 57.98 |  |  | 107 |  | $ | 56.97 |
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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=6415400&loc=d3e5070-113901 + 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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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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