Fair Value of Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value

The table below presents assets measured at fair value during 2018, categorized by the level of inputs used in the valuation of the assets (dollars in thousands):

			Fair Value at March 31, 2018 Using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	Total		(Level 1)		(Level 2)		(Level 3)
Recurring Fair Value Measurements:
Interest rate cap contract	$	84	$	—	$	84	$	—
Marketable securities	$	247,879	$	247,879	$	—	$	—

Schedule of Fair Value and Carrying Value of Financial Instruments

At March 31, 2018 and December 31, 2017, the fair value of these additional financial instruments were not materially different from their carrying values, except as follows (in thousands):

	March 31, 2018				December 31, 2017
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Senior unsecured debt and mortgage notes payable	$	681,675	$	693,328	$	856,940	$	874,280