Benefit Plans (Details 2) (Split-Dollar Life Insurance Benefit Plan, USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Split-Dollar Life Insurance Benefit Plan
Change in projected benefit obligation
Projected benefit obligation at beginning of year	$ 4,641	$ 4,353
Interest cost	42	196
Amortization of net actuarial loss		92
Projected benefit obligation at end of period	$ 4,683	$ 4,641