XML 28 R16.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Earnings Per Share | 12 Months Ended
--- | ---
Dec. 31, 2017
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE Basic earnings and diluted earnings per share data were computed as follows:
| Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Numerator for basic and diluted earnings per share: |  |  |  |  |
Net income | $ | 163,945 |  |  | $ | 109,857 |  |  | $ | 64,869 |
Denominator: |  |  |  |  |  |  |  |
Weighted-average basic common shares outstanding | 37,273 |  |  | 36,448 |  |  | 34,137 |
Assumed conversion of dilutive securities: |  |  |  |  |
Stock options | 1,973 |  |  | 2,513 |  |  | 2,415 |
Denominator for diluted earnings per share - Adjusted weighted-average shares | 39,246 |  |  | 38,961 |  |  | 36,552 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic | $ | 4.40 |  |  | $ | 3.01 |  |  | $ | 1.90 |
Diluted | $ | 4.18 |  |  | $ | 2.82 |  |  | $ | 1.77 |
Stock options representing the right to purchase common stock of 1,343,000 shares in 2017, 786,000 shares in 2016, and 417,000 shares in 2015 were not included in the computation of diluted earnings per share because their inclusion would have had an anti-dilutive effect.

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://www.xbrl.org/2003/role/presentationRef -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