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Restatement of Previously Issued Financial Statements (Tables)
 6 Months Ended
Jun. 30, 2012
Accounting Changes and Error Corrections [Abstract]  
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]
 
Six Months Ended June 30, 2011
 
As Reported
 
Adjustments
 
As Restated
Net income
$
55,647

 
$
5,179

 
$
60,826

Deferred income taxes
4,379

 
2,586

 
6,965

Accounts receivable
(24,890
)
 
2,978

 
(21,912
)
Prepaid expenses and other assets
(9,861
)
 
5,083

 
(4,778
)
Accounts payable
(11,861
)
 
(40
)
 
(11,901
)
Accrued expenses and other liabilities
(2,307
)
 
(4,653
)
 
(6,960
)
Deferred revenue
42,124

 
(12,179
)
 
29,945

Net cash provided by operating activities
94,160

 
(1,046
)
 
93,114

Payment of direct costs related to acquisitions
(1,703
)
 
1,703

 
—

Net cash (used in) provided by investing activities
(8,724
)
 
1,703

 
(7,021
)
Net increase in cash and cash equivalents
84,483

 
657

 
85,140

Cash and Cash Equivalents, End of Period
256,101

 
657

 
256,758

The following tables present the effect of the restatement adjustments on the condensed consolidated statements of comprehensive income:
 
Three Months Ended June 30, 2011
 
Six Months Ended June 30, 2011
 
As Reported
 
Adjustments
 
As Restated
 
As Reported
 
Adjustments
 
As Restated
Net income
$
10,119

 
$
2,594

 
$
12,713

 
$
55,647

 
$
5,179

 
$
60,826

Foreign currency translation adjustment, net of tax
1,857

 
1

 
1,858

 
3,117

 
10

 
3,127

Unrealized gains (losses) on cash flow hedges, net of tax
(360
)
 
90

 
(270
)
 
(170
)
 
65

 
(105
)
Reclassification adjustment for (gains) losses in net income
—

 
(90
)
 
(90
)
 
—

 
(66
)
 
(66
)
Other comprehensive income
1,497

 
1

 
1,498

 
2,947

 
9

 
2,956

Comprehensive income
11,616

 
2,595

 
14,211

 
58,594

 
5,188

 
63,782

The following tables summarize the effects of the restatement on the condensed consolidated financial statements for the three and six months ended June 30, 2011:
 
Three Months Ended June 30, 2011
 
Six Months Ended June 30, 2011
 
As Reported
 
Adjustments
 
As Restated
 
As Reported
 
Adjustments
 
As Restated
Software licenses
$
26,915

 
$
3,306

 
$
30,221

 
$
58,395

 
$
7,470

 
$
65,865

Maintenance services
66,100

 
31

 
66,131

 
130,868

 
45

 
130,913

Product revenues
96,865

 
3,337

 
100,202

 
198,107

 
7,515

 
205,622

Consulting services
59,033

 
(225
)
 
58,808

 
116,677

 
(491
)
 
116,186

Service revenues
65,545

 
(225
)
 
65,320

 
127,909

 
(491
)
 
127,418

Total revenues
162,410

 
3,112

 
165,522

 
326,016

 
7,024

 
333,040

Cost of maintenance services
14,672

 
64

 
14,736

 
28,658

 
64

 
28,722

Cost of product revenues
17,686

 
64

 
17,750

 
34,455

 
64

 
34,519

Cost of consulting services
47,575

 
(366
)
 
47,209

 
94,178

 
(668
)
 
93,510

Reimbursed expenses
6,512

 
—

 
6,512

 
11,231

 
1

 
11,232

Cost of service revenues
54,087

 
(366
)
 
53,721

 
105,409

 
(667
)
 
104,742

Total cost of revenues
71,773

 
(302
)
 
71,471

 
139,864

 
(603
)
 
139,261

Gross Profit
90,637

 
3,414

 
94,051

 
186,152

 
7,627

 
193,779

Product development
19,807

 
(45
)
 
19,762

 
39,943

 
(89
)
 
39,854

General and administrative
16,314

 
—

 
16,314

 
38,402

 
271

 
38,673

Restructuring charges
439

 
(470
)
 
(31
)
 
981

 
(470
)
 
511

Total operating expenses
71,516

 
(515
)
 
71,001

 
112,740

 
(288
)
 
112,452

Operating income
19,121

 
3,929

 
23,050

 
73,412

 
7,915

 
81,327

Interest income and other, net
(881
)
 
114

 
(767
)
 
(2,151
)
 
151

 
(2,000
)
Income before income taxes
13,563

 
3,815

 
17,378

 
62,913

 
7,764

 
70,677

Income tax provision
3,444

 
1,221

 
4,665

 
7,266

 
2,585

 
9,851

Net income
10,119

 
2,594

 
12,713

 
55,647

 
5,179

 
60,826

Basic net income per common share
$
0.24

 
$
0.06

 
$
0.30

 
$
1.32

 
$
0.12

 
$
1.44

Diluted net income per common share
$
0.24

 
$
0.06

 
$
0.30

 
$
1.30

 
$
0.13

 
$
1.43