Income Taxes - Schedule of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax at U.S. federal statutory tax rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	1.90%	1.80%	2.10%
Low-income housing, new markets tax credits, and other credits	(4.00%)	(3.00%)	(2.50%)
Other foreign tax differences, net	(0.20%)	(0.60%)	(0.60%)
Other, net	(0.90%)	(0.50%)	(0.20%)
Effective tax rate	31.80%	32.70%	33.80%