| Date Filed | Type | Description |
| 03/16/2023 |
10-K
| Annual Report for the period ended December 31, 2022 |
| 03/11/2022 |
10-K
| Annual Report for the period ended December 31, 2021 |
| 03/16/2021 |
10-K
| Annual Report for the period ended December 31, 2020 |
| 03/16/2020 |
10-K
| Annual Report for the period ended December 31, 2019 |
| 03/18/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 02/21/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 02/23/2017 |
10-K/A
| Annual Report for the period ended February 23, 2017 [amend] |
| 02/22/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 03/09/2016 |
10-K/A
| Annual Report for the period ended December 31, 2015 [amend] |
| 02/29/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 03/02/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 02/28/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 03/01/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/02/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/04/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/04/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/05/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/05/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/05/2008 |
AR
| 2007 Annual Report (overview, shareholder letter and financial summary only) |
| 03/05/2008 |
AR
| 2007 Annual Report (full report-includes Form 10-K) |
| 03/02/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/02/2007 |
AR
| 2006 Annual Report |
| 03/02/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/02/2006 |
AR
| 2005 Annual Report |
| 03/16/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 02/19/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 02/19/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 02/15/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/01/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/21/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 02/01/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/17/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 03/11/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 03/25/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |
|