Employee Benefit Plans (Amounts included in accumulated other comprehensive loss, net of tax, expected to be recognized in net periodic benefit cost during the next fiscal year) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service credit	$ 0
Net actuarial loss	471
Other postretirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service credit	33
Net actuarial loss	$ 0