XML 44 R8.htm IDEA: XBRL DOCUMENT v3.7.0.1
Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Statement of Cash Flows [Abstract]      
Accretion of interest on bond $ 5.7 $ 5.3 $ 5.0