XML 21 R9.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Earnings Per Share | 3 Months Ended
--- | ---
Mar. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share amounts):
|  | Three Months Ended
|  | March 31,
|  | 2018 |  | 2017
Numerator: |  |  |  |
Net income |  | $ | 41,635 |  |  | $ | 32,645 |
Denominator (in thousands): |  |  |  |
Weighted-average common shares for calculating basic earnings per share |  | 46,426 |  |  | 48,389 |
Effect of dilutive securities: |  |  |  |
Stock options and nonvested common stock awards |  | 53 |  |  | 13 |
Weighted-average common shares for calculating diluted earnings per share |  | 46,479 |  |  | 48,402 |
Net income per share: |  |  |  |
Basic |  | $ | 0.90 |  |  | $ | 0.67 |
Diluted |  | $ | 0.90 |  |  | $ | 0.67 |

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