XML 71 R57.htm IDEA: XBRL DOCUMENT v3.6.0.2
Stock Options, Restricted Stock and Restricted Stock Units - Share-based payment arrangements (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Schedule of information regarding share-based payment arrangements      
Proceeds from stock options exercised
Tax shortfall related to share-based payment arrangements (51) (24) (2,039)
Intrinsic value of stock options exercised