Accumulated Other Comprehensive Loss (Summary of Changes in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,040,400	$ 961,372
Ending balance	1,040,094	$ 965,364
Interest Rate Contract | Derivatives designated as hedging instruments:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Unamortized portion remaining in accumulated other comprehensive (loss) income	200
Unrealized Gain(loss) on Designated Derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(14,341)
Other comprehensive gain (loss), before reclassifications	23,613
Amount of gain (loss) reclassified from accumulated other comprehensive gain (loss)	2,653
Ending balance	$ 11,925