Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

767 Fifth Partners LLC’s interest rate swap contracts consisted of the following at March 31, 2017 (dollars in thousands):

Derivative Instrument	Aggregate Notional Amount		Effective Date	Maturity Date	Strike Rate Range					Balance Sheet Location	Fair Value
					Low			High
Interest Rate Swaps	$	325,000	June 7, 2017	June 7, 2027	2.423	%	-	2.950	%	Other Liabilities	$	(8,635	)
Interest Rate Swaps	125,000		June 7, 2017	June 7, 2027	2.336	%	-	2.418	%	Prepaid Expenses and Other Assets	551
	$	450,000									$	(8,084	)

767 Fifth Avenue Partners LLC’s interest rate swap contracts consisted of the following at December 31, 2016 (dollars in thousands):

Derivative Instrument	Aggregate Notional Amount		Effective Date	Maturity Date	Strike Rate Range					Balance Sheet Location	Fair Value
					Low			High
Interest Rate Swaps	$	350,000	June 7, 2017	June 7, 2027	2.418	%	-	2.950	%	Other Liabilities	$	(8,773	)
Interest Rate Swaps	100,000		June 7, 2017	June 7, 2027	2.336	%	-	2.388	%	Prepaid Expenses and Other Assets	509
	$	450,000									$	(8,264	)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table presents the location in the financial statements of the gains (losses) recognized related to the Company’s cash flow hedges for the three months ended March 31, 2017 and 2016:

	Three months ended March 31,
	2017			2016
	(in thousands)
Amount of gain (loss) related to the effective portion recognized in other comprehensive loss	$	180		$	(58,646	)
Amount of loss related to the effective portion subsequently reclassified to earnings	$	(1,306	)	$	(627	)
Amount of (gain) loss related to the ineffective portion and amount excluded from effectiveness testing	$	—		$	—

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Boston Properties, Inc.

The following table reflects the changes in accumulated other comprehensive loss for the three months ended March 31, 2017 and 2016 (in thousands):

Balance at December 31, 2016	$	(52,251	)
Effective portion of interest rate contracts	180
Amortization of interest rate contracts	1,306
Other comprehensive loss attributable to noncontrolling interests	(218		)
Balance at March 31, 2017	$	(50,983	)
Balance at December 31, 2015	$	(14,114	)
Effective portion of interest rate contracts	(58,646		)
Amortization of interest rate contracts	627
Other comprehensive income attributable to noncontrolling interests	15,427
Balance at March 31, 2016	$	(56,706	)

Boston Properties Limited Partnership

The following table reflects the changes in accumulated other comprehensive loss for the three months ended March 31, 2017 and 2016 (in thousands):

Balance at December 31, 2016	$	(60,853	)
Effective portion of interest rate contracts	180
Amortization of interest rate contracts	1,306
Other comprehensive loss attributable to noncontrolling interests	(72		)
Balance at March 31, 2017	$	(59,439	)
Balance at December 31, 2015	$	(18,337	)
Effective portion of interest rate contracts	(58,646		)
Amortization of interest rate contracts	627
Other comprehensive income attributable to noncontrolling interests	10,526
Balance at March 31, 2016	$	(65,830	)