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Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Cash paid during the period for:      
Interest $ 751 $ 874 $ 1,103
Income taxes 6,164 7,319 7,134
Non-cash transactions:      
Barter revenue 3,863 3,844 3,855
Barter expense 3,750 3,636 3,844
Purchase of treasury shares in connection with exercise of stock options 3,294 0 0
Acquisition of property and equipment 48 91 104
Acquisition of broadcast properties $ 50 $ 0 $ 0