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Shareholders' Equity and Common Stock Equivalents (Details 2) - $ / shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Options | 747,032 | 669,693 | 634,437
Total Outstanding Options, Weighted Average Option Price per Share | $ 27.67 | $ 24.00 |
Total Outstanding Options, Weighted Average Remaining Term | 6 years 10 months 24 days |  |
Vested and Exercisable Options | 273,117 | 281,632 |
Vested and Exercisable Options, Weighted Average Option Price per Share | $ 22.73 | $ 19.32 | $ 17.20
Vested and Exercisable Options, Weighted Average Remaining Term | 4 years 1 month 6 days |  |
Minimum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 13.83 |  |
Maximum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 36.04 |  |
Exercise Price Range Range One [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Options | 176,688 |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 18.57 |  |
Total Outstanding Options, Weighted Average Remaining Term | 2 years 3 months 18 days |  |
Vested and Exercisable Options | 157,029 |  |
Vested and Exercisable Options, Weighted Average Option Price per Share | $ 18.32 |  |
Vested and Exercisable Options, Weighted Average Remaining Term | 2 years 3 months 18 days |  |
Exercise Price Range Range One [Member] | Minimum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 13.83 |  |
Exercise Price Range Range One [Member] | Maximum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 20.75 |  |
Exercise Price Range Range Two [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Options | 450,674 |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 29.91 |  |
Total Outstanding Options, Weighted Average Remaining Term | 8 years 2 months 12 days |  |
Vested and Exercisable Options | 87,832 |  |
Vested and Exercisable Options, Weighted Average Option Price per Share | $ 27.50 |  |
Vested and Exercisable Options, Weighted Average Remaining Term | 6 years 2 months 12 days |  |
Exercise Price Range Range Two [Member] | Minimum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 28.88 |  |
Exercise Price Range Range Two [Member] | Maximum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 31.13 |  |
Exercise Price Range Range Three [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Options | 119,670 |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 32.67 |  |
Total Outstanding Options, Weighted Average Remaining Term | 8 years 3 months 18 days |  |
Vested and Exercisable Options | 28,256 |  |
Vested and Exercisable Options, Weighted Average Option Price per Share | $ 32.39 |  |
Vested and Exercisable Options, Weighted Average Remaining Term | 8 years 2 months 12 days |  |
Exercise Price Range Range Three [Member] | Minimum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 32.35 |  |
Exercise Price Range Range Three [Member] | Maximum [Member] |  |  |
Summary of options outstanding segregated by ranges of exercise prices |  |  |
Total Outstanding Options, Weighted Average Option Price per Share | $ 36.04 |  |

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