Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Change in Projected Benefit Obligation
Projected benefit obligation, beginning of period			$ 25,826	$ 20,032	$ 20,032
Service cost	$ 293	$ 307	860	613	821
Interest cost	271	$ 351	812	701	935
Actuarial loss			0		4,324
Benefits paid			(356)		(286)
Projected benefit obligation, end of period	27,142		27,142		25,826
Change in Plan Assets
Plan assets at fair value, beginning of period			0	$ 0	0
Company contributions			356		286
Benefits paid			(356)		(286)
Plan assets at fair value, end of period	0		0		0
Unfunded Status of the Plan	$ (27,142)		$ (27,142)		$ (25,826)