XML 47 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Net Income Per Share | 12 Months Ended
--- | ---
Dec. 31, 2018
Earnings Per Share [Abstract] |
Net Income Per Share | NET INCOME PER SHARE Basic net income per share is computed by dividing net income by the weighted-average shares outstanding during the reporting period. Diluted net income per share is computed by dividing net income by the combination of all dilutive common share equivalents, comprised of shares issuable under the Corporation’s share-based compensation plans, and the weighted-average shares outstanding during the reporting period. Dilutive common share equivalents include the dilutive effect of in-the-money share-based awards, which are calculated based on the average share price for each period using the treasury stock method. Under the treasury stock method, the exercise price of share-based awards, the amount of compensation expense, if any, for future service that the Corporation has not yet recognized, and the amount of estimated tax benefits that would be recorded in additional paid-in capital when share-based awards are exercised, are assumed to be used to repurchase common stock in the current period. The following table reconciles basic and diluted net income per share for the years indicated:
| 2018 |  | 2017 |  | 2016
|  |  | Weighted-Average Shares |  |  |  |  |  | Weighted-Average Shares |  |  |  |  |  | Weighted-Average Shares |  |
Basic net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 159,139 |  |  | 49,262,015 |  |  | $ | 3.23 |  |  | $ | 96,070 |  |  | 45,181,221 |  |  | $ | 2.13 |  |  | $ | 81,051 |  |  | 40,767,343 |  |  | $ | 1.99 |
Effect of dilutive stock options and restricted stock awards |  |  | 208,908 |  |  |  |  |  |  | 221,757 |  |  |  |  |  |  | 245,790 |  |  |
Diluted net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 159,139 |  |  | 49,470,923 |  |  | $ | 3.22 |  |  | $ | 96,070 |  |  | 45,402,978 |  |  | $ | 2.12 |  |  | $ | 81,051 |  |  | 41,013,133 |  |  | $ | 1.98 |
As of December 31, 2018 and 2017, there were no stock options with an option price greater than the average market price of the common shares. Options to purchase 51,949 shares of common stock, with a weighted average exercise price of $19.26 at December 31, 2016, were excluded from the computation of diluted net income per share because the options exercise price was greater than the average market price of the common stock.

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
Name: | us-gaap_EarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration