20.

Segments

Our reportable segments are separated by region based on the three regions in which we conduct our business: New York, Washington, D.C. and San Francisco. Our determination of segments is aligned with our method of internal reporting and the way our Chief Executive Officer, who is also our Chief Operating Decision Maker, makes key operating decisions, evaluates financial results and manages our business.

The following tables provide Net Operating Income (“NOI”) for each reportable segment for the three months ended March 31, 2018 and 2017.

	For the Three Months Ended March 31, 2018
(Amounts in thousands)	Total			New York			Washington, D.C.			San Francisco			Other
Property-related revenues	$	180,806		$	113,645		$	15,449		$	51,899		$	(187	)
Property-related operating expenses		(68,978	)		(47,161	)		(5,845	)		(14,116	)		(1,856	)
NOI from unconsolidated joint ventures		4,740			4,665			-			-			75
NOI⁽¹⁾	$	116,568		$	71,149		$	9,604		$	37,783		$	(1,968	)

	For the Three Months Ended March 31, 2017
(Amounts in thousands)	Total			New York			Washington, D.C.			San Francisco			Other
Property-related revenues	$	171,680		$	105,324		$	23,787		$	41,939		$	630
Property-related operating expenses		(65,971	)		(44,759	)		(8,924	)		(10,605	)		(1,683	)
NOI from unconsolidated joint ventures		4,823			4,753			-			-			70
NOI⁽¹⁾	$	110,532		$	65,318		$	14,863		$	31,334		$	(983	)

⁽¹⁾

NOI is used to measure the operating performance of our properties. NOI consists of property-related revenue (which includes rental income, tenant reimbursement income and certain other income) less operating expenses (which includes building expenses such as cleaning, security, repairs and maintenance, utilities, property administration and real estate taxes). We use NOI internally as a performance measure and believe it provides useful information to investors regarding our financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. Other real estate companies may use different methodologies for calculating NOI and, accordingly, our presentation of NOI may not be comparable to other real estate companies.

The following table provides a reconciliation of NOI to net income attributable to common stockholders for the periods set forth below.

	For the Three Months Ended March 31,
(Amounts in thousands)	2018			2017
NOI	$	116,568		$	110,532
Add (subtract) adjustments to arrive to net income:
Fee income		3,465			9,556
Depreciation and amortization expense		(65,156	)		(62,992	)
General and administrative expenses		(12,631	)		(13,581	)
Transaction related costs		(120	)		(275	)
NOI from unconsolidated joint ventures		(4,740	)		(4,823	)
(Loss) income from unconsolidated joint ventures		(62	)		1,937
(Loss) income from unconsolidated real estate funds		(66	)		288
Interest and other income, net		2,016			3,200
Interest and debt expense		(36,082	)		(37,018	)
Loss on early extinguishment of debt		-			(2,715	)
Unrealized gain on interest rate swaps		-			1,802
Net income before income taxes		3,192			5,911
Income tax expense		(477	)		(4,282	)
Net income		2,715			1,629
Less: net (income) loss attributable to noncontrolling interests in:
Consolidated joint ventures		(1,055	)		(1,291	)
Consolidated real estate fund		(430	)		88
Operating Partnership		(116	)		(54	)
Net income attributable to common stockholders	$	1,114		$	372

The following table provides the total assets for each of our reportable segments as of the periods set forth below.

(Amounts in thousands)
Total Assets as of:	Total		New York		Washington, D.C.		San Francisco		Other
March 31, 2018	$	8,973,868	$	5,544,187	$	687,726	$	2,425,865	$	316,090
December 31, 2017		8,917,661		5,511,061		693,408		2,421,173		292,019