| Stock Option Activity | |||||||||||
| Weighted | |||||||||||
| Weighted | average | Aggregate | |||||||||
| average | remaining | intrinsic | |||||||||
| Shares | exercise | contractual | value | ||||||||
| (In thousands) | price | term (In years) | (In millions) | ||||||||
| Outstanding at January 1, 2013 | 467,837 | $ | 19.27 | ||||||||
| Granted | 62,762 | 23.80 | |||||||||
| Exercised | (36,191) | 13.65 | |||||||||
| Forfeited | (9,688) | 18.95 | |||||||||
| Expired | (11,109) | 31.60 | |||||||||
| Outstanding at December 31, 2013 | 473,611 | $ | 20.02 | 6.5 | $ | 4,140 | |||||
| Exercisable at December 31, 2013 | 254,003 | $ | 20.15 | 5.1 | $ | 2,348 | |||||
| Options expected to vest | 200,909 | $ | 19.79 | 8.0 | $ | 1,656 | |||||