Annual report pursuant to Section 13 and 15(d)

IMPAIRMENT OF GOODWILL AND OTHER INDEFINITE-LIVED INTANGIBLE ASSETS (Details 4)

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IMPAIRMENT OF GOODWILL AND OTHER INDEFINITE-LIVED INTANGIBLE ASSETS (Details 4) - Goodwill [Member]
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Less than 10% [Member]      
Carrying Amounts And Fair Values Of Financial Instruments [Line Items]      
Number of market clusters 3 5 4
Carrying value $ 56,179 $ 81,507 $ 28,952
>10% to 20% [Member]      
Carrying Amounts And Fair Values Of Financial Instruments [Line Items]      
Number of market clusters 3 0 1
Carrying value $ 52,164 $ 0 $ 17,978
> 20% to 50% [Member]      
Carrying Amounts And Fair Values Of Financial Instruments [Line Items]      
Number of market clusters 2 2 3
Carrying value $ 37,570 $ 27,636 $ 45,375
> than 50% [Member]      
Carrying Amounts And Fair Values Of Financial Instruments [Line Items]      
Number of market clusters 11 7 3
Carrying value $ 169,907 $ 84,693 $ 45,152