SUBSEQUENT EVENTS (Quarterly Dividend Declaration) (Details) - Subsequent Event	Feb. 09, 2016 $ / shares
Class A common stock
Subsequent Event [Line Items]
Cash dividend (in dollars per share)	$ 0.22
Class B common stock
Subsequent Event [Line Items]
Cash dividend (in dollars per share)	$ 0.22

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant