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Supplementary Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]  
Supplementary Quarterly Financial Data (Unaudited)
SUPPLEMENTARY QUARTERLY FINANCIAL DATA (UNAUDITED)
 
 
For the Three Months Ended
 
March 31, 2016
 
June 30, 2016
 
September 30, 2016
 
December 31, 2016
Revenues
$
229,403

 
$
244,273

 
$
257,183

 
$
261,016

Cost of operations
135,775

 
133,971

 
134,459

 
137,832

Revenues less cost of operations
$
93,628

 
$
110,302

 
$
122,724

 
$
123,184

Net income
$
89,407

 
$
90,040

 
$
127,226

 
$
90,416

Net income attributable to common stockholders
$
82,592

 
$
83,044

 
$
118,088

 
$
82,403

Earnings per common share—basic
$
0.66

 
$
0.66

 
$
0.94

 
$
0.65

Earnings per common share—diluted
$
0.66

 
$
0.66

 
$
0.93

 
$
0.65

 
For the Three Months Ended
 
March 31, 2015
 
June 30, 2015
 
September 30, 2015
 
December 31, 2015
Revenues
$
173,154

 
$
185,860

 
$
197,497

 
$
225,759

Cost of operations
97,718

 
104,253

 
100,193

 
185,450

Revenues less cost of operations
$
75,436

 
$
81,607

 
$
97,304

 
$
40,309

Net income
$
58,636

 
$
60,956

 
$
78,200

 
$
11,744

Net income attributable to common stockholders
$
53,742

 
$
55,339

 
$
71,718

 
$
8,675

Earnings per common share—basic
$
0.46

 
$
0.47

 
$
0.58

 
$
0.07

Earnings per common share—diluted
$
0.46

 
$
0.47

 
$
0.58

 
$
0.07