Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Expected increase/(decrease) to interest expense			$ (200)
Derivatives designated as cash flow hedges in accounts payable, accrued expenses and other liabilities [Abstract]
Interest rate swaps			60	$ 846
Amount of unrealized losses recognized in accumulated other comprehensive income/(loss) on derivatives (effective portion) [Abstract]
Interest rate swaps/Unrealized loss reclassified to interest expense			(19)	(1,238)	$ (9,134)
Amount of (gains)/losses reclassified out of accumulated other comprehensive income/(loss) into interest expense (effective portion) [Abstract]
Interest rate swaps			$ 508	$ 247	(1,250)
3.050% (3.079% effective rate) Notes due 2030 [Member]
Derivatives, Fair Value [Line Items]
Principal amount of debt					$ 400,000
Stated interest rate (in hundredths)					3.05%
4.20% (4.234% effective rate) Notes due 2029 [Member]
Derivatives, Fair Value [Line Items]
Principal amount of debt					$ 350,000
Stated interest rate (in hundredths)					4.20%
Forward Starting Swaps [Member]
Derivatives, Fair Value [Line Items]
Amount of borrowings outstanding, subject to swaps					$ 150,000	$ 225,000
Underlying treasury rate term (in years)					10 years	10 years
Weighted average interest rate under derivative instruments (in hundredths)					1.87%	2.86%
Amount of unrealized losses recognized in accumulated other comprehensive income/(loss) on derivatives (effective portion) [Abstract]
Interest rate swaps/Unrealized loss reclassified to interest expense	$ (6,600)	$ (5,100)
Floating to Fixed Interest Rate Swaps (2017) [Member]
Derivatives, Fair Value [Line Items]
Amount of borrowings outstanding, subject to swaps							$ 50,000
Underlying treasury rate term (in years)							1 month
Weighted average interest rate under derivative instruments (in hundredths)							1.693%
Floating to Fixed Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Amount of borrowings outstanding, subject to swaps					$ 225,000
Underlying treasury rate term (in years)					1 month
Weighted average interest rate under derivative instruments (in hundredths)					1.678%