Acquisitions (Details 2) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | |||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2012
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Dec. 31, 2010
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Apr. 30, 2012
Policy Studies, Inc
|
Sep. 30, 2012
Policy Studies, Inc
|
Feb. 28, 2010
DeltaWare
|
Feb. 10, 2010
DeltaWare
|
Apr. 30, 2012
Customer relationships
Policy Studies, Inc
|
Apr. 30, 2012
Customer relationships
Policy Studies, Inc
Minimum
|
Apr. 30, 2012
Customer relationships
Policy Studies, Inc
Maximum
|
Apr. 30, 2012
Tradename
Policy Studies, Inc
|
Feb. 28, 2010
Tradename
DeltaWare
|
Feb. 10, 2010
Tradename
DeltaWare
|
Apr. 30, 2012
Technology-based intangible assets
Policy Studies, Inc
|
Apr. 30, 2012
Technology-based intangible assets
Policy Studies, Inc
Minimum
|
Apr. 30, 2012
Technology-based intangible assets
Policy Studies, Inc
Maximum
|
Feb. 28, 2010
Technology-based intangible assets
DeltaWare
|
Feb. 10, 2010
Technology-based intangible assets
DeltaWare
|
Feb. 10, 2010
Customer contracts and relationships
DeltaWare
|
Feb. 28, 2010
Customer contracts and relationships
DeltaWare
Minimum
|
Feb. 28, 2010
Customer contracts and relationships
DeltaWare
Maximum
|
Feb. 28, 2010
Non-compete arrangements
DeltaWare
|
Feb. 10, 2010
Non-compete arrangements
DeltaWare
|
|
Intangible assets acquired | |||||||||||||||||||||||||||||||
Useful life | 6 years 9 months 18 days | 8 years 7 months 6 days | 7 years | 8 years | 5 years | 10 years | 1 year | 5 years | 8 years 6 months | 8 years | 10 years | 4 years | |||||||||||||||||||
Fair value | $ 22,183 | $ 6,060 | $ 16,600 | $ 3,800 | $ 614 | $ 1,783 | $ 3,733 | $ 1,474 | $ 239 | ||||||||||||||||||||||
Fair value of the future estimated obligation related contract | 3,015 | ||||||||||||||||||||||||||||||
Revenue and net income | |||||||||||||||||||||||||||||||
Revenue | 300,736 | 266,353 | 243,452 | 239,603 | 250,107 | 238,296 | 227,116 | 214,114 | 1,050,145 | 929,633 | 831,749 | 60,100 | |||||||||||||||||||
Operating income | $ 39,973 | $ 33,299 | $ 27,398 | $ 26,905 | $ 34,836 | $ 30,779 | $ 29,494 | $ 27,292 | $ 127,575 | $ 122,401 | $ 107,406 |