Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

The following summary represents the unaudited quarterly results of operations for the years ended December 31, 2017 and 2016 (dollars in thousands, except per share data):

	For the three months ended (1)
	3/31/17		6/30/17		9/30/17		12/31/17
Total revenue	$	522,326	$	530,512	$	550,500	$	555,292
Net income	$	235,781	$	165,194	$	238,199	$	237,486
Net income attributable to common stockholders	$	235,875	$	165,225	$	238,248	$	237,573
Net income per common share - basic	$	1.72	$	1.20	$	1.73	$	1.72
Net income per common share - diluted	$	1.72	$	1.20	$	1.72	$	1.72

	For the three months ended (1)
	3/31/16		6/30/16		9/30/16		12/31/16
Total revenue	$	508,498	$	502,307	$	516,211	$	518,240
Net income	$	237,877	$	197,319	$	356,329	$	242,183
Net income attributable to common stockholders	$	237,931	$	197,444	$	356,392	$	242,235
Net income per common share - basic	$	1.73	$	1.44	$	2.60	$	1.76
Net income per common share - diluted	$	1.73	$	1.44	$	2.59	$	1.76

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(1) Amounts may not equal full year results due to rounding.