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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2014
Supplemental Cash Flow Elements [Abstract]  
Supplemental cash flow information
 
 
Years Ended December 31,
 
 
 
2014
 
2013
 
2012
 
 
 
(In thousands)
 
 
 
 
 
 
 
 
 
 
 
 
Cash paid during the period for:
 
 
 
 
 
 
 
 
 
 
Interest
 
$
874
 
$
1,103
 
$
1,559
 
Income taxes
 
$
7,319
 
$
7,134
 
$
6,999
 
Non-cash transactions:
 
 
 
 
 
 
 
 
 
 
Barter revenue
 
$
3,844
 
$
3,855
 
$
4,188
 
Barter expense
 
$
3,636
 
$
3,844
 
$
3,894
 
Acquisition of property and equipment
 
$
91
 
$
104
 
$
99