Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v3.3.1.900
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Advertising cost        
Advertising $ 57,705 $ 54,909 $ 55,282  
Cash and Cash Equivalents        
Maximum original maturity period of cash equivalents 3 months      
Cash held at various banking institutions $ 134,574 108,372 $ 118,216 $ 65,082
Cash held in non-interest-bearing accounts 99,800      
Cash held in foreign bank accounts $ 34,816 $ 35,065