SEC Filings

Form	Description	Filing date	View
8-K	Report of unscheduled material events or corporate event	Oct 25, 2023	View HTML 0001097149-23-000075.pdf 0001097149-23-000075.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
8-K	Report of unscheduled material events or corporate event	Oct 27, 2023	View HTML 0001097149-23-000078.pdf 0001097149-23-000078.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
8-K	Report of unscheduled material events or corporate event	Nov 06, 2023	View HTML 0001097149-23-000087.pdf 0001097149-23-000087.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
8-K	Report of unscheduled material events or corporate event	Dec 05, 2023	View HTML 0001097149-23-000091.pdf 0001097149-23-000091.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
8-K	Report of unscheduled material events or corporate event	Jan 17, 2024	View HTML 0001097149-24-000003.pdf 0001097149-24-000003.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
8-K	Report of unscheduled material events or corporate event	Jan 31, 2024	View HTML 0001097149-24-000007.pdf 0001097149-24-000007.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
8-K/A	Amendment to a previously filed 8-K	Jun 01, 2005	View HTML 0001275287-05-002110.pdf 0001275287-05-002110.xls
8-K/A	Amendment to a previously filed 8-K	Jan 22, 2009	View HTML 0001144204-09-002969.pdf 0001144204-09-002969.xls
8-K/A	Amendment to a previously filed 8-K	May 27, 2009	View HTML 0001144204-09-029670.pdf 0001144204-09-029670.xls
8-K/A	Amendment to a previously filed 8-K	Jul 15, 2011	View HTML 0001193125-11-189479.pdf 0001193125-11-189479.xls
8-K/A	Amendment to a previously filed 8-K	Jul 28, 2016	View HTML 0001102624-16-003158.pdf 0001102624-16-003158.xls
8-K/A	Amendment to a previously filed 8-K	Oct 02, 2017	View HTML 0001097149-17-000032.pdf 0001097149-17-000032.xls
8-K/A	Amendment to a previously filed 8-K	Apr 11, 2019	View HTML 0001097149-19-000016.pdf 0001097149-19-000016.xls
8-K/A	Amendment to a previously filed 8-K	May 02, 2022	View HTML 0001097149-22-000031.pdf 0001097149-22-000031.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
8-K/A	Amendment to a previously filed 8-K	Oct 31, 2022	View HTML 0001097149-22-000064.pdf 0001097149-22-000064.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
ARS	An annual report to security holders	Apr 19, 2005	View HTML
ARS	An annual report to security holders	Apr 05, 2023	View HTML 0001097149-23-000031.pdf
ARS	An annual report to security holders	Apr 09, 2024	View HTML 0001097149-24-000020.pdf
CORRESP	CORRESP	Nov 04, 2009	View HTML 0001104659-09-062527.pdf 0001104659-09-062527.xls
CORRESP	CORRESP	Jun 28, 2013	View HTML 0001097149-13-000021.pdf 0001097149-13-000021.xls