SEC Filings

Form	Description	Filing date	View
10-K	Annual report which provides a comprehensive overview of the company for the past year	Mar 27, 2002	View HTML 0001097149-02-000007.pdf 0001097149-02-000007.xls
10-K	Annual report which provides a comprehensive overview of the company for the past year	Mar 01, 2013	View HTML 0001097149-13-000007.pdf 0001097149-13-000007.xls EX-101.INS - XBRL INSTANCE DOCUMENT
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 28, 2014	View HTML 0001445305-14-000789.pdf 0001445305-14-000789.xls EX-101.INS - XBRL INSTANCE DOCUMENT
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 26, 2015	View HTML 0001097149-15-000005.pdf 0001097149-15-000005.xls EX-101.INS - XBRL INSTANCE DOCUMENT
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 25, 2016	View HTML 0001097149-16-000031.pdf 0001097149-16-000031.xls EX-101.INS - XBRL INSTANCE DOCUMENT
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 28, 2017	View HTML 0001097149-17-000009.pdf 0001097149-17-000009.xls EX-101.INS - XBRL INSTANCE DOCUMENT
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 28, 2018	View HTML 0001097149-18-000010.pdf 0001097149-18-000010.xls EX-101.INS - XBRL INSTANCE DOCUMENT
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 28, 2019	View HTML 0001097149-19-000009.pdf 0001097149-19-000009.xls EX-101.INS - XBRL INSTANCE DOCUMENT
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 28, 2020	View HTML 0001097149-20-000008.pdf 0001097149-20-000008.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 26, 2021	View HTML 0001097149-21-000007.pdf 0001097149-21-000007.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA