RETIREMENT PLANS: (Details 3)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Principal assumptions used (benefit obligation):
Discount rate (percent)	4.95%	4.05%
Rate of increase in compensation levels (percent)	3.50%	3.50%
Principal assumptions used (net periodic benefit):
Discount rate	4.05%	4.40%
Rate of increase in compensation levels	3.50%	3.50%
Expected long-term rate of return on plan assets (percent)	6.00%	6.00%