Stock-Based Compensation Plan (Tables)
|3 Months Ended|
Mar. 31, 2018
|Stock-Based Compensation Plan [Abstract]|
|Schedule Of Valuation Assumptions Used In Computing Fair Value Of Stock-Based Awards||
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.
Reference 1: http://www.xbrl.org/2003/role/presentationRef