| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 04/26/18 | 8-K | Form 8-K: Current report filing | 42 | |
| 04/06/18 | DEF 14A | Form DEF 14A: Definitive proxy statements | 72 | |
| 03/26/18 | 8-K | Form 8-K: Current report filing | 10 | |
| 03/16/18 | 424B5 | Form 424B5: Prospectus filed pursuant to Rule 424(b)(5) | 117 | |
| 03/15/18 | FWP | Form FWP: Filing under Securities Act Rules 163/433 of free writing prospectuses | 2 | |
| 03/15/18 | 424B2 | Form 424B2: Prospectus filed pursuant to Rule 424(b)(2) | 116 | |
| 03/12/18 | 11-K | Form 11-K: Annual report of employee stock purchase, savings and similar plans | 8 | |
| 03/05/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 03/05/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 03/05/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |