XML 51 R38.htm IDEA: XBRL DOCUMENT v3.20.2
Goodwill and other intangible assets - Goodwill (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Goodwill [Roll Forward]  
Goodwill, Beginning Balance $ 501,145
Goodwill acquired 28,000
Goodwill, Ending Balance $ 529,145