Employee Benefit Plans - Annual Retirement Plan Expense Assumptions (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Discount rate	4.27%	5.29%	5.85%
Long-term rate of return on plan assets	4.65%	5.30%	5.70%
Increase in compensation levels	3.30%	3.30%	3.30%