CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net Income	$ 3,821		$ 3,237		$ 39,334		$ 38,275
Other Comprehensive Loss - Net of Tax:
Unrealized Loss on Available-for-Sale Securities	(23)	[1]	(136)	[1]	(297)	[1]	215	[1]
Unrealized Gain on Derivatives - Other	7	[1]	7	[1]	14	[1]	14	[1]
Other Comprehensive Gain (Loss) - Net of Tax	(16)	[1]	(129)	[1]	(283)	[1]	229	[1]
Comprehensive Income	$ 3,805		$ 3,108		$ 39,051		$ 38,504
Combined statutory tax rate	41.00%		41.00%		41.00%		41.00%

[1] Determined using a combined statutory tax rate of 41% .