Number of Stock Options and Restricted Share Awards that were Issued or Outstanding but were Excluded in Calculating Diluted Earnings Per Share Because their Effect would have been Anti-Dilutive (Detail) - shares shares in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||||
| Anti-dilutive securities excluded from the computation of dilutive EPS | 2,445 | 1,107 | 2,316 | 2,104 |
| Stock options | ||||
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||||
| Anti-dilutive securities excluded from the computation of dilutive EPS | 2,302 | 1,083 | 2,227 | 2,094 |
| Restricted share awards | ||||
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||||
| Anti-dilutive securities excluded from the computation of dilutive EPS | 143 | 24 | 89 | 10 |