Debt - Narrative (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 29, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
LIBOR floor	0.25%				0.25%		0.00%
Dividend (in usd per share)	$ 0.01	$ 0.01	$ 0.01		$ 0.01
Capital improvements limit					$ 90,000,000.0
Letters of credit outstanding	$ 6,800,000				6,800,000			$ 2,800,000
Estimated fair value of debt	106,600,000				106,600,000			101,200,000
Unrealized gain (loss) on derivative instruments	9,722,000			$ (7,874,000)	(44,948,000)	$ (38,002,000)
AOCI Attributable to Parent [Member]
Line of Credit Facility [Line Items]
Unrealized gain (loss) on derivative instruments	9,722,000			(7,874,000)	(44,948,000)	(38,002,000)
Interest rate swaps
Line of Credit Facility [Line Items]
Derivative instruments, liability position, fair value	66,200,000				66,200,000
Expected reclassifications in next 12 months	27,600,000				27,600,000
Interest rate swaps | Interest expense
Line of Credit Facility [Line Items]
Reclassification of gain (loss) from AOCI to interest expense	7,600,000			$ (1,600,000)	15,600,000	$ (6,400,000)
Letters of credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	30,000,000.0				30,000,000.0
Unsecured debt | Unsecured term loans
Line of Credit Facility [Line Items]
Debt outstanding	1,975,000,000				1,975,000,000			1,975,000,000
Borrowings, fixed interest rate	1,600,000,000				1,600,000,000			1,600,000,000
Unsecured debt | Revolving credit facilities
Line of Credit Facility [Line Items]
Debt outstanding	290,000,000				290,000,000			165,000,000
Unsecured debt | Senior unsecured credit facility | Revolving credit facilities
Line of Credit Facility [Line Items]
Debt outstanding	290,000,000				290,000,000			165,000,000
Maximum borrowing capacity	650,000,000.0				650,000,000.0
Remaining borrowing capacity	353,200,000				353,200,000
Maximum borrowing capacity potential increase (up to)	1,300,000,000				$ 1,300,000,000
Unsecured debt | Senior unsecured credit facility | Revolving credit facilities | Minimum
Line of Credit Facility [Line Items]
Unused commitment fee annual rate					0.20%
Unsecured debt | Senior unsecured credit facility | Revolving credit facilities | Minimum | LIBOR
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus					1.45%
Unsecured debt | Senior unsecured credit facility | Revolving credit facilities | Maximum
Line of Credit Facility [Line Items]
Unused commitment fee annual rate					0.30%
Unsecured debt | Senior unsecured credit facility | Revolving credit facilities | Maximum | LIBOR
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus					2.25%
Unsecured debt | PHL unsecured credit facility | Revolving credit facilities
Line of Credit Facility [Line Items]
Debt outstanding	0				$ 0			0
Maximum borrowing capacity	25,000,000.0				25,000,000.0
Remaining borrowing capacity	25,000,000.0				$ 25,000,000.0
Unsecured debt | PHL unsecured credit facility | Revolving credit facilities | Minimum | LIBOR
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus					1.45%
Unsecured debt | PHL unsecured credit facility | Revolving credit facilities | Maximum | LIBOR
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus					2.25%
Unsecured debt | Sixth Term Loan, $300 Million Tranche | Unsecured term loans
Line of Credit Facility [Line Items]
Debt outstanding	300,000,000.0				$ 300,000,000.0
Senior unsecured notes
Line of Credit Facility [Line Items]
Debt outstanding	100,000,000				100,000,000			100,000,000
Senior unsecured notes | Series A Notes
Line of Credit Facility [Line Items]
Debt outstanding	$ 60,000,000				$ 60,000,000			60,000,000
Stated interest rate	4.70%				4.70%
Senior unsecured notes | Series B Notes
Line of Credit Facility [Line Items]
Debt outstanding	$ 40,000,000				$ 40,000,000			40,000,000
Stated interest rate	4.93%				4.93%
Cash flow hedging | Designated as hedging instrument | Interest rate swap, not yet effective
Line of Credit Facility [Line Items]
Notional value	$ 290,000,000.0				$ 290,000,000.0			590,000,000.0
Cash flow hedging | Designated as hedging instrument | Interest rate swaps
Line of Credit Facility [Line Items]
Notional value	$ 1,630,000,000				$ 1,630,000,000			$ 1,630,000,000