Hedging Exposure Future Cash Flows with Interest Rate Swaps For Forecasted Transactions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	22 months
Weighted Average Fixed Interest Rate in Contract	1.36%
Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Notional Amount	$ 10,100,000
12 Months or Less
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	8 months
Weighted Average Fixed Interest Rate in Contract	1.80%
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	2,800,000
Over 12 Months to 24 Months
Derivative Instruments Gain Loss [Line Items]
Remaining Term in Months	17 months
Weighted Average Fixed Interest Rate in Contract	1.53%
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	3,300,000
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	0.95%
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	0.87%
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	$ 1,600,000