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Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2011
Quarterly Financial Data (Unaudited) [Abstract]  
Schedule of Quarterly Financial Information [Table Text Block]
Quarterly financial data for 2011 and 2010 is as follows:
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 
(In thousands, except per share amounts)
2011
 

 
 

 
 

 
 

Revenues
$
579,699

 
$
576,774

 
$
572,999

 
$
586,568

Costs and expenses
(453,253
)
 
(461,751
)
 
(465,949
)
 
(456,551
)
Gross profits
126,446

 
115,023

 
107,050

 
130,017

Operating income
97,193

 
80,495

 
78,186

 
107,825

Income from continuing operations before income taxes (1)
63,994

 
44,827

 
44,042

 
72,773

Provision for income taxes
(24,065
)
 
(18,089
)
 
(9,027
)
 
(28,223
)
Net income
39,929

 
26,738

 
35,015

 
44,550

Net (income) loss attributable to noncontrolling interests
(1,165
)
 
(645
)
 
481

 
—

Net income attributable to common stockholders
38,764

 
26,093

 
35,496

 
44,550

Net income attributable to common stockholders per share (2):
 

 
 

 
 

 
 

Basic — EPS
0.16

 
0.11

 
0.15

 
0.20

Diluted — EPS
0.16

 
0.11

 
0.15

 
0.20

2010
 

 
 

 
 

 
 

Revenues
$
530,863

 
$
555,273

 
$
533,165

 
$
571,251

Costs and expenses
(418,505
)
 
(445,975
)
 
(430,518
)
 
(446,331
)
Gross profits
112,358

 
109,298

 
102,647

 
124,920

Operating income
85,626

 
95,926

 
68,496

 
103,998

Income from continuing operations before income taxes (1)
51,441

 
67,425

 
28,621

 
71,972

Provision for income taxes
(20,116
)
 
(27,198
)
 
(9,941
)
 
(35,203
)
Net income
31,325

 
40,227

 
18,680

 
36,769

Net (income) loss attributable to noncontrolling interests
(413
)
 
58

 
85

 
(314
)
Net income attributable to common stockholders
30,912

 
40,285

 
18,765

 
36,455

Net income attributable to common stockholders per share (2):
 

 
 

 
 

 
 

Basic — EPS
0.12

 
0.16

 
0.08

 
0.15

Diluted — EPS
0.12

 
0.16

 
0.08

 
0.15

_________________________________
(1)
Includes (losses) gains on divestitures and impairment charges, net, as described in Note 20.
(2)
Net income per share is computed independently for each of the quarters presented. Therefore, the sum of the quarters’ net income per share may not equal the total computed for the year.