Selected Quarterly Financial Data

12 Months Ended

Dec. 31, 2017

Selected Quarterly Financial Data [Abstract]

Selected Quarterly Financial Data

31. Selected quarterly financial data (unaudited)

The following is a summary of selected quarterly financial information (unaudited):

							Attributable to stockholders
				Operating		Net		Net	Earnings per share
2017		Revenues		income		income		income		Basic		Diluted
First quarter	$	124,499	$	23,597	$	10,433	$	10,377	$	0.10	$	0.10
Second quarter		166,186		26,888		17,713		17,635		0.16		0.16
Third quarter		141,047		16,931		10,323		10,261		0.10		0.09
Fourth quarter		178,785		40,038		36,837		36,754		0.34		0.34

						Net	Attributable to stockholders
				Operating		income		Net income	Earnings (loss) per share
2016		Revenues		income		(loss)		(loss)		Basic		Diluted
First quarter	$	131,945	$	39,174	$	29,994	$	29,406	$	0.28	$	0.27
Second quarter		158,805		53,635		40,591		39,710		0.37		0.37
Third quarter		128,876		2,285		(5,000)		(5,137)		(0.05)		(0.05)
Fourth quarter		146,769		40,628		27,927		27,853		0.26		0.26

							Attributable to stockholders
				Operating		Net		Net	Earnings per share
2015		Revenues		income		income		income		Basic		Diluted
First quarter	$	115,618	$	33,019	$	24,110	$	23,777	$	0.22	$	0.22
Second quarter		155,477		62,795		45,846		45,083		0.42		0.42
Third quarter		109,318		28,602		21,247		20,825		0.19		0.19
Fourth quarter		135,462		50,424		47,372		46,529		0.43		0.43