Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2023

USD ($)

Dec. 31, 2022

USD ($)

Dec. 31, 2021

USD ($)

Dec. 31, 2020

USD ($)

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

	Summary Compensation Table Total for CEO	Compensation Actually Paid to CEO	Average Summary Compensation Table Total for Non-CEO NEOs	Average Compensation Actually Paid to Non-CEO NEOs	Value of Initial Fixed $100 Investment Based On:		Net Income (in thousands)	Core FFO per Share (3)
Year					Company Total Stockholder Return (1)	Peer Group Total Stockholder Return (1) (2)
2023	$4,702,879	$3,043,369	$1,702,484	$1,240,696	$59.74	$57.33	$151,330	$3.75
2022	$4,955,360	$2,584,246	$1,797,158	$1,113,748	$66.54	$55.95	$163,958	$3.90
2021	$4,082,600	$4,686,212	$1,536,521	$1,741,687	$100.18	$89.75	$323,310	$3.77
2020	$3,324,467	$2,662,196	$1,287,325	$974,748	$85.18	$75.71	$357,914	$3.61

Company Selected Measure Name

Core FFO per Share

Peer Group Issuers, Footnote

For 2022 and 2023, our peer group consisted of Brandywine Realty Trust, City Office REIT, Inc., Corporate Office Properties Trust (now known as COPT Defense Properties), Cousins Properties Incorporated, Hudson Pacific Properties, Inc., Kilroy Realty Corporation and Piedmont Office Realty Trust, Inc. For 2020 and 2021, our peer group consisted of Brandywine Realty Trust, Inc., Columbia Property Trust, Corporate Office Properties Trust (now known as COPT Defense Properties), Cousins Properties Incorporated, Hudson Pacific Properties, Inc., Kilroy Realty Corporation, Mack-Cali Realty Corporation (now known as Veris Residential, Inc.) and Piedmont Office Realty Trust, Inc. The returns of each REIT have been weighted based on each company's stock market capitalization as of December 31, 2019.

PEO Total Compensation Amount

$ 4,702,879

$ 4,955,360

$ 4,082,600

$ 3,324,467

PEO Actually Paid Compensation Amount

$ 3,043,369

2,584,246

4,686,212

2,662,196

Adjustment To PEO Compensation, Footnote

The following table reconciles the information set forth in the "Compensation Actually Paid" columns in the table above to the "Summary Compensation Table Total" columns:

	Year	Summary Compensation Table Total	(-) Stock Awards from Summary Compensation Table	(+) Fair value as of End of Year of All Awards Granted During the Year That Are Outstanding and Unvested as of the End of the Year	(+/-) Change as of the End of the Year (From the End of the Prior Year) in Fair Value of Any Awards Granted in Any Prior Year That Are Outstanding and Unvested as of the End of the Year	(+/-) Change as of the Vesting Date (From the End of the Prior Year) in Fair Value of Any Awards Granted in Any Prior Year That Were Scheduled to Vest During the Year	Compensation Actually Paid
Theodore J. Klinck	2023	$4,702,879	($2,540,103)	$1,963,228	($1,033,502)	($49,133)	$3,043,369
	2022	$4,955,360	($2,596,634)	$1,671,087	($1,404,870)	($40,697)	$2,584,246
	2021	$4,082,600	($1,892,549)	$2,224,453	$273,871	($2,163)	$4,686,212
	2020	$3,324,467	($1,669,699)	$1,538,355	($409,653)	($121,274)	$2,662,196
Non-CEO NEO Average	2023	$1,702,484	($755,819)	$597,632	($289,007)	($14,594)	$1,240,696
	2022	$1,797,158	($776,761)	$499,876	($390,020)	($16,505)	$1,113,748
	2021	$1,536,521	($587,527)	$685,882	$107,871	($1,060)	$1,741,687
	2020	$1,287,325	($519,584)	$471,862	($207,675)	($57,180)	$974,748

Non-PEO NEO Average Total Compensation Amount

$ 1,702,484

1,797,158

1,536,521

1,287,325

Non-PEO NEO Average Compensation Actually Paid Amount

$ 1,240,696

1,113,748

1,741,687

974,748

Adjustment to Non-PEO NEO Compensation Footnote

The following table reconciles the information set forth in the "Compensation Actually Paid" columns in the table above to the "Summary Compensation Table Total" columns:

	Year	Summary Compensation Table Total	(-) Stock Awards from Summary Compensation Table	(+) Fair value as of End of Year of All Awards Granted During the Year That Are Outstanding and Unvested as of the End of the Year	(+/-) Change as of the End of the Year (From the End of the Prior Year) in Fair Value of Any Awards Granted in Any Prior Year That Are Outstanding and Unvested as of the End of the Year	(+/-) Change as of the Vesting Date (From the End of the Prior Year) in Fair Value of Any Awards Granted in Any Prior Year That Were Scheduled to Vest During the Year	Compensation Actually Paid
Theodore J. Klinck	2023	$4,702,879	($2,540,103)	$1,963,228	($1,033,502)	($49,133)	$3,043,369
	2022	$4,955,360	($2,596,634)	$1,671,087	($1,404,870)	($40,697)	$2,584,246
	2021	$4,082,600	($1,892,549)	$2,224,453	$273,871	($2,163)	$4,686,212
	2020	$3,324,467	($1,669,699)	$1,538,355	($409,653)	($121,274)	$2,662,196
Non-CEO NEO Average	2023	$1,702,484	($755,819)	$597,632	($289,007)	($14,594)	$1,240,696
	2022	$1,797,158	($776,761)	$499,876	($390,020)	($16,505)	$1,113,748
	2021	$1,536,521	($587,527)	$685,882	$107,871	($1,060)	$1,741,687
	2020	$1,287,325	($519,584)	$471,862	($207,675)	($57,180)	$974,748

Compensation Actually Paid vs. Total Shareholder Return

Compensation Actually Paid vs. Net Income

Compensation Actually Paid vs. Company Selected Measure

Tabular List, Table

The compensation and governance committee considers the following to be the most important financial performance measures used to link compensation actually paid to company performance during the last fiscal year:

•Our company’s absolute total stockholder return;

•Our company’s total stockholder return relative to the total return of our peer group;

•Core FFO per share;

•FFO per share;

•Net operating income (on a market-by-market basis, inclusive of other income, general and administrative expense and a capital charge/credit applied to net operating income derived from investment activity and excluding unusual charges or credits); and

•Average occupancy (on a market-by-market basis).

Total Shareholder Return Amount

$ 59.74

66.54

100.18

85.18

Peer Group Total Shareholder Return Amount

57.33

55.95

89.75

75.71

Net Income (Loss)

$ 151,330,000

$ 163,958,000

$ 323,310,000

$ 357,914,000

Company Selected Measure Amount

3.75

3.90

3.77

3.61

PEO Name

Theodore J. Klinck

Additional 402(v) Disclosure

The total stockholder return information assumes an investment on December 31, 2019 and further assumes the reinvestment of dividends. Total stockholder return performance is not necessarily indicative of future results.

Measure:: 1

Pay vs Performance Disclosure

Name

absolute total stockholder return

Non-GAAP Measure Description

"Core FFO per Share" is defined as FFO per share excluding one-time items such as land sale gains, impairments and debt extinguishment charges.

Measure:: 2

Pay vs Performance Disclosure

Name

total stockholder return relative to the total return of our peer group

Measure:: 3

Pay vs Performance Disclosure

Name

Core FFO per share

Measure:: 4

Pay vs Performance Disclosure

Name

FFO per share;

Measure:: 5

Pay vs Performance Disclosure

Name

Net operating income

Measure:: 6

Pay vs Performance Disclosure

Name

Average occupancy

PEO | Adjustment, Equity Awards Reported Value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (2,540,103)

$ (2,596,634)

$ (1,892,549)

$ (1,669,699)

PEO | Equity Awards Granted During the Year, Outstanding and Unvested [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

1,963,228

1,671,087

2,224,453

1,538,355

PEO | Equity Awards Granted During the Prior Year, Outstanding and Unvested [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(1,033,502)

(1,404,870)

273,871

(409,653)

PEO | Equity Awards Granted During the Prior Year, Expected to Vest [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(49,133)

(40,697)

(2,163)

(121,274)

Non-PEO NEO | Adjustment, Equity Awards Reported Value [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(755,819)

(776,761)

(587,527)

(519,584)

Non-PEO NEO | Equity Awards Granted During the Year, Outstanding and Unvested [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

597,632

499,876

685,882

471,862

Non-PEO NEO | Equity Awards Granted During the Prior Year, Outstanding and Unvested [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(289,007)

(390,020)

107,871

(207,675)

Non-PEO NEO | Equity Awards Granted During the Prior Year, Expected to Vest [Member]

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (14,594)

$ (16,505)

$ (1,060)

$ (57,180)