Derivative and Other Fair Value Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Summary of Carrying and Fair Values of Financial Instruments

The following table provides a summary of the carrying and fair values for the Company’s mortgage notes payable and unsecured debt (including its commercial paper and line of credit, if applicable) at December 31, 2017 and 2016, respectively (amounts in thousands):

	December 31, 2017				December 31, 2016
	Estimated Fair Value (Level 2)		Carrying Value		Estimated Fair Value (Level 2)		Carrying Value
Mortgage notes payable, net	$	3,615,384	$	3,618,722	$	4,161,001	$	4,119,181
Unsecured debt, net		5,619,744		5,338,569		5,030,330		4,868,077
Total debt, net	$	9,235,128	$	8,957,291	$	9,191,331	$	8,987,258

Summary of Consolidated Derivative Instruments

The following table summarizes the Company’s consolidated derivative instruments at December 31, 2017 (dollar amounts are in thousands):

	Fair Value Hedges (1)			Forward Starting Swaps (2)
Current Notional Balance	$	450,000		$	250,000
Lowest Interest Rate		2.375	%		2.1478	%
Highest Interest Rate		2.375	%		2.2895	%
Earliest Maturity Date	2019			2028
Latest Maturity Date	2019			2029

(1) Fair Value Hedges – Converts outstanding fixed rate unsecured notes ($450.0 million 2.375%notes due July 1, 2019) to a floating interest rate of 90-Day LIBOR plus 0.61%.

(2) Forward Starting Swaps – Designed to partially fix interest rates in advance of planned future debt issuances.  Of the $250.0 million notional balance, $200.0 million of these swaps have mandatory counterparty terminations in 2019 and are targeted for certain 2018 debt issuances while $50.0 million of these swaps have mandatory counterparty terminations in 2020 and are targeted for certain 2019 debt issuances.

Summary of Fair Value Measurements for Each Major Category of Assets and Liabilities Measured at Fair Value on Recurring Basis

The following tables provide a summary of the fair value measurements for each major category of assets and liabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at December 31, 2017 and 2016, respectively (amounts in thousands):

				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	12/31/2017		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Forward Starting Swaps	Other Assets	$	5,143	$	—	$	5,143	$	—
Supplemental Executive Retirement Plan	Other Assets		140,159		140,159		—		—
Total		$	145,302	$	140,159	$	5,143	$	—
Liabilities
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Liabilities	$	1,597	$	—	$	1,597	$	—
Supplemental Executive Retirement Plan	Other Liabilities		140,159		140,159		—		—
Total		$	141,756	$	140,159	$	1,597	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	366,955	$	—	$	366,955	$	—

				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	12/31/2016		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Assets	$	1,857	$	—	$	1,857	$	—
Supplemental Executive Retirement Plan	Other Assets		124,420		124,420		—		—
Total		$	126,277	$	124,420	$	1,857	$	—
Liabilities
Supplemental Executive Retirement Plan	Other Liabilities	$	124,420	$	124,420	$	—	$	—
Total		$	124,420	$	124,420	$	—	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	442,092	$	—	$	442,092	$	—

Summary of Effect of Fair Value Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income

The following tables provide a summary of the effect of fair value hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2017, 2016 and 2015, respectively (amounts in thousands):

December 31, 2017 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative			Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	(3,454	)	Fixed rate debt	Interest expense	$	3,454
Total		$	(3,454	)			$	3,454

December 31, 2016 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative			Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	(1,798	)	Fixed rate debt	Interest expense	$	1,798
Total		$	(1,798	)			$	1,798

December 31, 2015 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative		Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	2,058	Fixed rate debt	Interest expense	$	(2,058	)
Total		$	2,058			$	(2,058	)

Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income

The following tables provide a summary of the effect of cash flow hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2017, 2016 and 2015, respectively (amounts in thousands):

	Effective Portion						Ineffective Portion
December 31, 2017 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative		Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	6,439	Interest expense	$	(18,858	)	Interest expense	$	—
Total	$	6,439		$	(18,858	)		$	—

	Effective Portion							Ineffective Portion
December 31, 2016 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	(3,989	)	Interest expense	$	(41,758	)	Interest expense	$	(74	)
Total	$	(3,989	)		$	(41,758	)		$	(74	)

	Effective Portion							Ineffective Portion
December 31, 2015 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	(814	)	Interest expense	$	(18,244	)	Interest expense	$	(3,033	)
Total	$	(814	)		$	(18,244	)		$	(3,033	)