v2.4.0.8

Share-Based Payments (Share Options) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Allocated Share-based Compensation Expense | $ 2,800,000 | $ 1,600,000 | $ 1,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Balance at beginning of year (in shares) | 25,952 |  |
Granted (in shares) | 222,110 | 0 | 0
Forfeited (in shares) | (83,284) |  |
Expired (in shares) | (12,544) |  |
Exercised (in shares) | (36,037) |  |
Balance at end of year (in shares) | 116,197 | 25,952 |
Total Exercisable Shares | 116,197 |  |
Weighted Average Exercise Price at beginning of year | $ 20.13 |  |
Weighted Average Exercise Price, Granted | $ 64.11 |  |
Weighted Average Exercise Price, Forfeited | $ 69.27 |  |
Weighted Average Exercise Price, Expired | $ 81.78 |  |
Weighted Average Exercise Price, Exercised | $ 11.46 |  |
Weighted Average Exercise Price at end of year | $ 65.01 | $ 20.13 |
Exercisable, Weighted Average Exercise Price | $ 65.01 |  |
Weighted Average Remaining Contractual Term | 2 years 9 months 19 days |  |
Aggregate Intrinsic Value | 550,000 |  |
Exercisable, Weighted Average Remaining Contractual Term | 2 years 9 months 19 days |  |
Exercisable, Aggregate Intrinsic Value | 550,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value | 410,000 | 5,000 | 65,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract] |  |  |
Number of Option Shares | 116,197 |  |
Weighted Average Remaining Contractual Life | 2 years 9 months 7 days |  |
Weighted Average Exercise Price of Option Shares | $ 65.01 |  |
Number of Exercisable Option Shares | 116,197 |  |
Weighted Average Exercise Price of Exercisable Option Shares | $ 65.01 |  |
Stock-based compensation expense | $ 2,844,000 | $ 1,622,000 | $ 1,635,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 0.00 To 9.99 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract] |  |  |
Range of Exercise Prices, Lower Limit | $ 0.00 |  |
Range of Exercise Prices, Upper Limit | $ 9.99 |  |
Number of Option Shares | 29,602 |  |
Weighted Average Remaining Contractual Life | 5 years 0 months 2 days |  |
Weighted Average Exercise Price of Option Shares | $ 9.91 |  |
Number of Exercisable Option Shares | 29,602 |  |
Weighted Average Exercise Price of Exercisable Option Shares | $ 9.91 |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 10.00 To 19.99 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract] |  |  |
Range of Exercise Prices, Lower Limit | $ 10.00 |  |
Range of Exercise Prices, Upper Limit | $ 19.99 |  |
Number of Option Shares | 2,879 |  |
Weighted Average Remaining Contractual Life | 1 year 0 months 1 day |  |
Weighted Average Exercise Price of Option Shares | $ 17.36 |  |
Number of Exercisable Option Shares | 2,879 |  |
Weighted Average Exercise Price of Exercisable Option Shares | $ 17.36 |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 20.00 To 29.99 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract] |  |  |
Range of Exercise Prices, Lower Limit | $ 20.00 |  |
Range of Exercise Prices, Upper Limit | $ 29.99 |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 30.00 To 39.99 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract] |  |  |
Range of Exercise Prices, Lower Limit | $ 30.00 |  |
Range of Exercise Prices, Upper Limit | $ 39.99 |  |
Number of Option Shares | 4,051 |  |
Weighted Average Remaining Contractual Life | 3 years 1 month 22 days |  |
Weighted Average Exercise Price of Option Shares | $ 30.86 |  |
Number of Exercisable Option Shares | 4,051 |  |
Weighted Average Exercise Price of Exercisable Option Shares | $ 30.86 |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 40.00 To 49.99 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract] |  |  |
Range of Exercise Prices, Lower Limit | $ 40.00 |  |
Range of Exercise Prices, Upper Limit | $ 49.99 |  |
Number of Option Shares | 349 |  |
Weighted Average Remaining Contractual Life | 4 years 5 months 26 days |  |
Weighted Average Exercise Price of Option Shares | $ 44.49 |  |
Number of Exercisable Option Shares | 349 |  |
Weighted Average Exercise Price of Exercisable Option Shares | $ 44.49 |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 50.00 To 146.41 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract] |  |  |
Range of Exercise Prices, Lower Limit | $ 50.00 |  |
Range of Exercise Prices, Upper Limit | $ 146.41 |  |
Number of Option Shares | 79,316 |  |
Weighted Average Remaining Contractual Life | 1 year 11 months 14 days |  |
Weighted Average Exercise Price of Option Shares | $ 89.14 |  |
Number of Exercisable Option Shares | 79,316 |  |
Weighted Average Exercise Price of Exercisable Option Shares | $ 89.14 |  |
Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award, Exercisable Period | 5 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Share Based Compensation Arrangement By Share Based Payment Award, Maximum Term | 10 years |  |

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