Hedging Exposure Future Cash Flows with Interest Rate Swaps For Forecasted Transactions (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Derivative Instruments Gain Loss [Line Items]
Weighted Average Fixed Interest Rate in Contract	1.35%
Wtd. Avg. Remaining Term in Months	19 months
Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	$ 9,900,000
12 Months or Less
Derivative Instruments Gain Loss [Line Items]
Weighted Average Fixed Interest Rate in Contract	1.78%
Wtd. Avg. Remaining Term in Months	7 months
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	3,800,000
Over 12 Months to 24 Months
Derivative Instruments Gain Loss [Line Items]
Weighted Average Fixed Interest Rate in Contract	1.30%
Wtd. Avg. Remaining Term in Months	18 months
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	2,700,000
Over 24 Months to 36 Months
Derivative Instruments Gain Loss [Line Items]
Weighted Average Fixed Interest Rate in Contract	0.91%
Wtd. Avg. Remaining Term in Months	31 months
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	2,600,000
Over 36 Months to 48 Months
Derivative Instruments Gain Loss [Line Items]
Weighted Average Fixed Interest Rate in Contract	0.93%
Wtd. Avg. Remaining Term in Months	41 months
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	$ 800,000