XML 61 R46.htm IDEA: XBRL DOCUMENT v3.3.1.900
Summary of Significant Accounting Policies - Goodwill (Details) - USD ($)
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Accounting Policies [Abstract]      
Goodwill   $ 185,151,000 $ 185,151,000
Goodwill impairment $ 0