Stock Compensation Plan (Details) (USD $) | 3 Months Ended | |
In Millions, except Share data, unless otherwise specified | Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013 |
Stock-based compensation expense and related income tax benefits | ' | ' | ' |
Stock-based compensation expense | $1.40 | $1.70 | ' |
Income tax benefit | -0.5 | -0.6 | ' |
Stock-based compensation, net of income tax benefit | 0.9 | 1.1 | ' |
Compensation costs related to equity awards and amounts recognized | ' | ' | ' |
Compensation expense recognized | -1.4 | -1.7 | ' |
Outstanding stock options and SARs | ' | ' | ' |
Excess tax benefits (deficiency) related to the exercise or vesting of stock-based awards | 1.9 | 0.3 | ' |
Performance Shares and RSUs | ' | ' | ' |
Stock-based compensation expense and related income tax benefits | ' | ' | ' |
Stock-based compensation expense | 0.8 | ' | ' |
Compensation costs related to equity awards and amounts recognized | ' | ' | ' |
Unrecognized compensation cost at the beginning of the period | 2 | ' | ' |
Grant date fair value of current year grants | 2.4 | ' | ' |
Compensation expense recognized | -0.8 | ' | ' |
Unrecognized compensation cost at the end of the period | 3.6 | ' | ' |
Expected amortization period | '2 years 3 months 18 days | ' | ' |
Stock options and SARs | ' | ' | ' |
Stock-based compensation expense and related income tax benefits | ' | ' | ' |
Stock-based compensation expense | 0.6 | ' | ' |
Compensation costs related to equity awards and amounts recognized | ' | ' | ' |
Unrecognized compensation cost at the beginning of the period | 1.3 | ' | ' |
Grant date fair value of current year grants | 1.2 | ' | ' |
Compensation expense recognized | -0.6 | ' | ' |
Unrecognized compensation cost at the end of the period | 1.9 | ' | ' |
Expected amortization period | '2 years 8 months 12 days | ' | ' |
Fair value assumptions | ' | ' | ' |
Expected term in years | '5 years 10 months 24 days | ' | ' |
Risk free interest rate (as a percent) | 1.90% | ' | ' |
Volatility (as a percent) | 36.50% | ' | ' |
Dividend yield (as a percent) | 2.20% | ' | ' |
Additional disclosures | ' | ' | ' |
Aggregate pre-tax intrinsic value of stock options and SARs exercised | 6.9 | 1.9 | ' |
Outstanding stock options and SARs | ' | ' | ' |
Stock options and SARs vested or expected to vest (in shares) | 782,000 | ' | 946,000 |
Aggregate intrinsic value (in dollars) | 20.2 | ' | 18.4 |
Per share weighted average grant date fair value (in dollars per share) | $8.98 | ' | $8.40 |
Exercisable stock options and SARs (in shares) | 472,000 | ' | 622,000 |
Aggregate intrinsic value (in dollars) | 13.8 | ' | 12.9 |
Unvested stock options and SARs (in shares) | 333,000 | ' | 328,000 |
Per share weighted average grant date fair value (in dollars per share) | $9.31 | ' | $9.11 |
Nonqualified stock options | ' | ' | ' |
Stock options awarded | ' | ' | ' |
Nonqualified stock options granted (in shares) | 91,300 | ' | ' |
Per share weighted average exercise price (in dollars per share) | $42.91 | ' | ' |
Per share weighted average grant date fair value (in dollars per share) | $12.63 | ' | ' |
Performance units | ' | ' | ' |
Additional disclosures | ' | ' | ' |
Percentage of target to be awarded, low end of range | 40.00% | ' | ' |
Percentage of target to be awarded, high end of range | 200.00% | ' | ' |
Common stock earned as a percentage of the performance unit target | 95.00% | ' | ' |
Market price at grant date of performance units | $42.82 | ' | ' |
Granted (in shares) | 60,900 | ' | ' |
Nonqualified stock options and SARs | ' | ' | ' |
Stock options and SARs vested | ' | ' | ' |
Vested (in shares) | 103,500 | ' | ' |
Aggregate grant date fair value | 0.9 | ' | ' |
Omnibus Plan | ' | ' | ' |
Stock Compensation Plans | ' | ' | ' |
Additional common stock reserved for issuance subject to shareholders approval (in shares) | 1,577,000 | ' | ' |
Par value of shares of common stock (in dollars per share) | $0.01 | ' | ' |
Shares of common stock reserved for future issuance | 1,865,000 | ' | ' |
LTIP | Stock options | Participants | ' | ' | ' |
Additional disclosures | ' | ' | ' |
Shares outstanding that vested and would have been exercisable had the participants reached retirement age | 51,000 | ' | ' |
Aggregate grant date fair value of options subject to accelerated vesting | $0.50 | ' | ' |