Employee Benefit Plans - Allocation of Plan Assets (Details)											12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 US equity securities	Dec. 31, 2012 US equity securities	Dec. 31, 2013 Non-US equity securities	Dec. 31, 2012 Non-US equity securities	Dec. 31, 2013 Fixed-income securities	Dec. 31, 2012 Fixed-income securities	Dec. 31, 2013 Other	Dec. 31, 2012 Other	Dec. 31, 2013 Scenario, Forecast [Member]	Dec. 31, 2013 Scenario, Forecast [Member] US equity securities	Dec. 31, 2013 Scenario, Forecast [Member] Non-US equity securities	Dec. 31, 2013 Scenario, Forecast [Member] Fixed-income securities	Dec. 31, 2013 Scenario, Forecast [Member] Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation											100.00%	10.00%	15.00%	70.00%	5.00%
Percentage of plan assets as of December 31,	100.00%	100.00%	10.00%	11.00%	16.00%	14.00%	69.00%	69.00%	5.00%	6.00%