Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND RECENT TRANSACTIONS (Details 4)

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ACQUISITIONS AND RECENT TRANSACTIONS (Details 4) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Class A and Class B common stock, Dividend Announcement Date         Dec. 02, 2014 Sep. 02, 2014 May 27, 2014 Mar. 06, 2014      
Class A and Class B common stock, Dividend Record Date         Dec. 15, 2014 Sep. 16, 2014 Jun. 16, 2014 Mar. 17, 2014      
Class A and Class B common stock, Dividend Payment Date         Dec. 29, 2014 Sep. 30, 2014 Jun. 30, 2014 Mar. 31, 2014      
Class A and Class B common stock, Dividend Amount Per Share         $ 0.0650 $ 0.0625 $ 0.0600 $ 0.0575 $ 0.26 $ 0.24 $ 0.21
Class A and Class B common stock, Cash Distributed $ 1,700 $ 1,700 $ 1,700 $ 1,600 $ 1,646 $ 1,579 $ 1,514 $ 1,444 $ 6,612 $ 6,183 $ 5,158