Equity - COPLP and Subsidiaries (Tables)

12 Months Ended

Dec. 31, 2014

Class of Stock [Line Items]

Schedule of additional information pertaining to preferred shares

The table below sets forth additional information pertaining to COPT’s outstanding preferred shares (dollars in thousands, except per share data):

Series	# of Shares Issued	Aggregate Liquidation Preference		Month of Issuance	Annual Dividend Yield		Annual Dividend Per Share		Earliest Redemption Date
Series K	531,667	$	26,583	January 2007	5.600	%	$	2.80000	1/9/2017
Series L	6,900,000	172,500		June 2012	7.375	%	$	1.84375	6/27/2017
	7,431,667	$	199,083

Corporate Office Properties, L.P.

Class of Stock [Line Items]

Schedule of additional information pertaining to preferred shares

The table below sets forth information pertaining to preferred units in COPLP held by COPT at December 31, 2014 (dollars in thousands, except per unit data):

Series	# of Units Issued	Aggregate Liquidation Preference		Month of Issuance	Annual Distribution Yield		Annual Distribution Per Unit		Earliest Redemption Date
Series K	531,667	$	26,583	January 2007	5.600	%	$	2.80000	1/9/2017
Series L	6,900,000	172,500		June 2012	7.375	%	$	1.84375	6/27/2017
	7,431,667	$	199,083