Hedging Exposure Future Cash Flows with Interest Rate Swaps For Forecasted Transactions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	24 months
Weighted Average Fixed Interest Rate in Contract	1.37%
Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	$ 10,500,000
12 Months or Less
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	8 months
Weighted Average Fixed Interest Rate in Contract	1.71%
Maturity - lower remaining maturity range	0 months
Maturity - higher remaining maturity range	12 months
12 Months or Less | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	2,200,000
Over 12 Months to 24 Months
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	18 months
Weighted Average Fixed Interest Rate in Contract	1.73%
Maturity - lower remaining maturity range	12 months
Maturity - higher remaining maturity range	24 months
Over 12 Months to 24 Months | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	3,700,000
Over 24 Months to 36 Months
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	30 months
Weighted Average Fixed Interest Rate in Contract	0.92%
Maturity - lower remaining maturity range	24 months
Maturity - higher remaining maturity range	36 months
Over 24 Months to 36 Months | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	2,400,000
Over 36 Months to 48 Months
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	41 months
Weighted Average Fixed Interest Rate in Contract	0.89%
Maturity - lower remaining maturity range	36 months
Maturity - higher remaining maturity range	48 months
Over 36 Months to 48 Months | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	1,800,000
Over 48 Months to 60 Months
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	50 months
Weighted Average Fixed Interest Rate in Contract	0.96%
Maturity - lower remaining maturity range	48 months
Maturity - higher remaining maturity range	60 months
Over 48 Months to 60 Months | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	$ 400,000