NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details 9) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
Liability related to underfunded status of defined benefit pension plan	$ 4,700,000	$ 1,900,000
Fisher SERP
Future expected benefits payment
2015	1,481,000
2016	1,726,000
2017	1,665,000
2018	1,608,000
2019	1,554,000
Next 5 years	7,196,000
Fisher SERP | Fisher
Post-retirement Benefits
Carrying value of annuity contracts and life insurance policies		18,200,000
Estimated projected benefit obligation	24,000,000
Benefit payments	2,100,000	500,000
Periodic pension expense	1,000,000	400,000
Actuarial gain	3,200,000	200,000
Discount rate for projected benefit obligation (as a percent)	3.69%	4.51%
Fisher SERP | Fisher | Accrued expenses
Post-retirement Benefits
Estimated projected benefit obligation	1,500,000
Fisher SERP | Fisher | Other long-term liabilities
Post-retirement Benefits
Estimated projected benefit obligation	$ 22,500,000