Employee Benefit Plans - Weighted-Average Actuarial Assumptions Used (Details) - Pension Plans [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.44%	3.78%	4.21%
Expected long-term rate of return on plan assets	4.54%	5.45%	5.10%
Rate of expected increase in future compensation levels	3.36%	3.34%	3.21%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.71%	2.44%
Rate of expected increase in future compensation levels	3.24%	3.18%