Summary of Quarterly Results (unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Results of Operations

The following table summarizes our quarterly results of operations for the years ended December 31, 2018 and 2017.

			Net income (loss)
			attributable to the			Income (Loss) Per Common Share
(Amounts in thousands, except per share amounts)	Revenues		common stockholders			Basic			Diluted
2018:
December 31	$	190,675	$	5,318		$	0.02		$	0.02
September 30		192,596		37,531			0.16			0.16
June 30		191,419		(34,816	)		(0.14	)		(0.14	)
March 31		184,271		1,114		0.00			0.00
2017:
December 31	$	180,257	$	(6,793	)	$	(0.03	)	$	(0.03	)
September 30		179,770		(10,214	)		(0.04	)		(0.04	)
June 30		177,704		103,016			0.44			0.44
March 31		181,236		372			0.00			0.00