SEC Filings

Form	Description	Filing date	View
10-K	Annual report which provides a comprehensive overview of the company for the past year	Feb 25, 2022	View HTML 0001097149-22-000011.pdf 0001097149-22-000011.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 27, 2023	View HTML 0001097149-23-000013.pdf 0001097149-23-000013.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 28, 2024	View HTML 0001097149-24-000011.pdf 0001097149-24-000011.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
10-K405	Annual report. The Regulation S-K Item 405 box on the cover page is checked	Apr 02, 2001	View HTML 0000929624-01-000528.pdf 0000929624-01-000528.xls
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
CORRESP	CORRESP	May 05, 2016	View HTML 0001097149-16-000052.pdf 0001097149-16-000052.xls
CORRESP	CORRESP	Dec 11, 2009	View HTML 0001193125-09-251710.pdf 0001193125-09-251710.xls
CORRESP	CORRESP	Apr 12, 2022	View HTML 0001097149-22-000019.pdf 0001097149-22-000019.xls
CORRESP	CORRESP	May 25, 2022	View HTML 0001097149-22-000044.pdf 0001097149-22-000044.xls
CORRESP	CORRESP	May 11, 2022	View HTML 0001097149-22-000039.pdf 0001097149-22-000039.xls
CORRESP	CORRESP	Apr 21, 2022	View HTML 0001097149-22-000022.pdf 0001097149-22-000022.xls
CT ORDER	CT ORDER	Feb 24, 2010	View HTML 9999999997-10-001296.pdf
DEFR14A	DEFR14A	Apr 16, 2024	View HTML 0001097149-24-000023.pdf 0001097149-24-000023.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
144	Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing	Mar 01, 2012	View HTML 0001140361-12-011956.pdf 0001140361-12-011956.xls
144	Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing	Jul 27, 2012	View HTML 0001140361-12-034146.pdf 0001140361-12-034146.xls
144	Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing	May 01, 2013	View HTML 0001140361-13-018155.pdf 0001140361-13-018155.xls
144	Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing	Jul 24, 2013	View HTML 0001140361-13-028833.pdf 0001140361-13-028833.xls
144	Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing	Jul 25, 2013	View HTML 0001140361-13-028936.pdf 0001140361-13-028936.xls
144	Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing	Aug 29, 2013	View HTML 0001140361-13-034568.pdf 0001140361-13-034568.xls