| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 04/24/18 | DEF 14A | Form DEF 14A: Definitive proxy statements | 49 | |
| 04/26/17 | DEF 14A | Form DEF 14A: Definitive proxy statements | 48 | |
| 04/26/16 | DEF 14A | Form DEF 14A: Definitive proxy statements | 50 | |
| 04/24/15 | DEF 14A | Form DEF 14A: Definitive proxy statements | 89 | |
| 04/28/14 | DEF 14A | Form DEF 14A: Definitive proxy statements | 50 | |
| 04/19/13 | DEF 14A | Form DEF 14A: Definitive proxy statements | 46 | |
| 04/20/12 | DEF 14A | Form DEF 14A: Definitive proxy statements | 49 | |
| 04/10/12 | PRE 14A | Form PRE 14A: Preliminary proxy statement not related to a contested matter or merger/acquisition | 50 | |
| 04/29/11 | DEF 14A | Form DEF 14A: Definitive proxy statements | 48 | |
| 04/22/10 | DEF 14A | Form DEF 14A: Definitive proxy statements | 46 |