XML 89 R72.htm IDEA: XBRL DOCUMENT v3.3.1.900
EQUITY-BASED COMPENSATION - Director Stock Awards (Details 5) - Common Stock - Outside directors - shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Equity-based compensation    
Grant of stock (in shares) 30,440 32,317
Stock issued in lieu of cash for director fees (in shares) 6,246 7,539