Annual report pursuant to Section 13 and 15(d)

Acquisitions (Details)

v3.3.1.900
Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 04, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]        
Acquisition of business, net of cash acquired   $ 0 $ (1,144) $ 525,352
Agero, Inc. [Member]        
Business Acquisition [Line Items]        
Acquisition of business, net of cash acquired $ 525,352   $ (1,144)