CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 4,284	$ 5,542	$ 28,728	$ 16,166
OTHER COMPREHENSIVE INCOME, NET OF TAX:
Unrealized (loss) gain on available-for-sale securities, net of tax of $9, none, $10 and none, respectively	(19)	(54)	20	(19)
Employee benefit plan:
Actuarial gain on retirement plan, net of tax of none for all periods presented	0	0	0	0
Amortization of prior service cost and actuarial loss for retirement plan included in net periodic pension costs, net of tax of $54, none, $162 and none, respectively	92	169	275	508
Net change for employee benefit plan	92	169	275	508
TOTAL OTHER COMPREHENSIVE INCOME	73	115	295	489
COMPREHENSIVE INCOME	4,357	5,657	29,023	16,655
Unrealized gain on available-for-sale securities, tax	9	0	10	0
Actuarial gain on retirement plan, tax	0	0	0	0
Amortization of prior service cost and actuarial loss for retirement plan included in net periodic pension costs, tax	$ 54	$ 0	$ 162	$ 0