LONG-TERM DEBT: (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Total Debt	$ 824,078,000	$ 815,652,000
Senior Secured Leverage	4.23
Total Leverage	8.17
Interest Coverage	1.32
Credit Agreement 2011 [Member]
Pro Forma Last Twelve Months Covenant EBITDA	83,300,000
Pro Forma Last Twelve Months Interest Expense	63,200,000
Senior Debt	352,500,000
Total Debt	$ 680,300,000
Senior Secured Debt [Member] | Covenant Limit [Member] | Credit Agreement 2011 [Member]
Senior Secured Leverage	4.5
Total Leverage	8.5
Interest Coverage	1.1
Senior Secured Debt [Member] | Excess Coverage [Member] | Credit Agreement 2011 [Member]
Senior Secured Leverage	0.27
Total Leverage	0.33
Interest Coverage	0.22