Commitments and Contingencies: (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum rental payments by the Company

Minimum future rental payments required under the leases are as follows:

Year Ending December 31,
2015	$	15,449
2016	15,472
2017	15,457
2018	11,342
2019	9,821
Thereafter	309,369
	$	376,910