Shareholders' Equity - Schedule of Stock Option Activity (Details) - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Number of Options, Outstanding - beginning of Period	2,782,868	2,350,166	1,794,709
Number of Options, Granted	584,301	853,896	683,001
Number of Options, Exercised	(169,771)	(116,787)	(36,980)
Number of Options, Forfeited/Expired	(252,358)	(304,407)	(90,564)
Number of Options, Outstanding - end of period	2,945,040	2,782,868	2,350,166
Number of Options, Exercisable - end of period	1,096,116	917,592	647,343
Weighted Average Exercise Price, Outstanding - beginning of Period	$ 20.73	$ 17.57	$ 15.42
Weighted Average Exercise Price, Granted	37.72	28.67	22.80
Weighted Average Exercise Price, Exercised	14.98	15.52	14.50
Weighted Average Exercise Price, Forfeited/Expired	23.69	20.55	15.85
Weighted Average Exercise Price, Outstanding - end of period	24.18	20.73	17.57
Weighted Average Exercise Price, Exercisable - end of period	$ 16.01	$ 15.40	$ 15.22

No definition available.

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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.

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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.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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