Acquisition, Goodwill and Intangibles Net Purchase Price and Preliminary Allocation for Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Dec. 21, 2012
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	$ 32,600
Liquent Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	74,731
Accounts receivable	8,687
Other current and non-current assets	547
Property and equipment	1,382
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	32,600
Business Acquisition, Purchase Price Allocation, Goodwill Amount	51,449
Total assets acquired	94,665
Current liabilities	5,403
Deferred revenue, current	2,830
Deferred tax liabilities	11,701
Total liabilities assumed	19,934
Net assets acquired:	$ 74,731