Derivatives and Hedging Activities (Details 4) (USD $) | 6 Months Ended | | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended |
In Thousands, unless otherwise specified | Jun. 30, 2014 | Jan. 10, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 |
| Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] | Interest Rate Swap [Member] |
| | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] | Designated as Hedging Instrument [Member] |
| | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] | Cash Flow Hedging [Member] |
| | | | | | Derivative Instrument, Fixed Interest Rate 5.299 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.299 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.299 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.299 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.307 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.307 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.307 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.307 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.580 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.580 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.580 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.580 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 One [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 One [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 One [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 One [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 Two [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 Two [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 Two [Member] | Derivative Instrument, Fixed Interest Rate 5.512 Percent Original Maturity October 2014 Two [Member] | Derivative Instrument, Fixed Interest Rate 5.436 Percent Original Maturity October 2017 One [Member] | Derivative Instrument, Fixed Interest Rate 5.436 Percent Original Maturity October 2017 Two [Member] | Derivative Instrument, Fixed Interest Rate 4.605 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.605 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.605 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.605 Percent Original Maturity July 2014 [Member] | Derivative Instrument Fixed Interest Rate 4.743 Percent Original Maturity October 2014 [Member] | Derivative Instrument Fixed Interest Rate 4.743 Percent Original Maturity October 2014 [Member] | Derivative Instrument Fixed Interest Rate 4.743 Percent Original Maturity October 2014 [Member] | Derivative Instrument Fixed Interest Rate 4.743 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.305 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.305 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.305 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.305 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.365 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.365 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.365 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.365 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 5.526 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.526 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.526 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.526 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 3.989 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 3.989 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 3.989 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 3.989 Percent Original Maturity October 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.033 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.033 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.033 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.033 Percent Original Maturity July 2017 [Member] | Derivative Instrument, Fixed Interest Rate 4.328 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.328 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.328 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.328 Percent Original Maturity July 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.147 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.147 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.147 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.147 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.000 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.000 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.000 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 4.000 Percent Original Maturity October 2014 [Member] | Derivative Instrument, Fixed Interest Rate 5.174 Percent Original Maturity October 2017 [Member] |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Original Maximum Notional Amount | ' | ' | ' | ' | ' | ' | $60,852 | ' | $60,852 | ' | $200,000 | ' | $200,000 | ' | $163,333 | ' | $163,333 | ' | $150,000 | ' | $150,000 | ' | $150,000 | ' | $150,000 | ' | $480,088 | $480,088 | $163,333 | ' | $163,333 | ' | $332,525 | ' | $332,525 | ' | $58,238 | ' | $58,238 | ' | $193,333 | ' | $193,333 | ' | $37,000 | ' | $37,000 | ' | $53,286 | ' | $53,286 | ' | $181,667 | ' | $181,667 | ' | $43,333 | ' | $43,333 | ' | $211,567 | ' | $211,567 | ' | $150,000 | ' | $150,000 | ' | $427,407 |
Fixed Rate % | ' | 0.76% | 0.76% | ' | 0.76% | ' | 5.30% | ' | 5.30% | ' | 5.31% | ' | 5.31% | ' | 5.58% | ' | 5.58% | ' | 5.51% | ' | 5.51% | ' | 5.51% | ' | 5.51% | ' | 5.44% | 5.44% | 4.61% | ' | 4.61% | ' | 4.74% | ' | 4.74% | ' | 4.31% | ' | 4.31% | ' | 4.37% | ' | 4.37% | ' | 5.53% | ' | 5.53% | ' | 3.99% | ' | 3.99% | ' | 4.03% | ' | 4.03% | ' | 4.33% | ' | 4.33% | ' | 4.15% | ' | 4.15% | ' | 4.00% | ' | 4.00% | ' | 5.17% |
Deferred Loss Upon Termination | ' | ' | 127,529 | ' | 127,529 | ' | 1,853 | ' | 1,853 | ' | 6,412 | ' | 6,412 | ' | 3,773 | ' | 3,773 | ' | 1,711 | ' | 1,711 | ' | 3,498 | ' | 3,498 | ' | 1,711 | 1,526 | 2,082 | ' | 2,082 | ' | 7,641 | ' | 7,641 | ' | 862 | ' | 862 | ' | 3,265 | ' | 3,265 | ' | 3,122 | ' | 3,122 | ' | 2,048 | ' | 2,048 | ' | 8,538 | ' | 8,538 | ' | 11,033 | ' | 11,033 | ' | 17,002 | ' | 17,002 | ' | 5,080 | ' | 5,080 | ' | 46,372 |
Un-amortized Deferred (Gain) Loss | ' | ' | 57,373 | ' | 57,373 | ' | -5 | ' | -5 | ' | -9 | ' | -9 | ' | 26 | ' | 26 | ' | 17 | ' | 17 | ' | 51 | ' | 51 | ' | 1,711 | 1,526 | -30 | ' | -30 | ' | -114 | ' | -114 | ' | -134 | ' | -134 | ' | -465 | ' | -465 | ' | 44 | ' | 44 | ' | 749 | ' | 749 | ' | 2,955 | ' | 2,955 | ' | 499 | ' | 499 | ' | 3,387 | ' | 3,387 | ' | 793 | ' | 793 | ' | 46,372 |
Amount of Deferred Loss Amortized (including Accelerated Amortization) into Interest Expense | ' | ' | 4,389 | 5,031 | 8,995 | 10,248 | 3 | 9 | 7 | 21 | 13 | 39 | 31 | 85 | 85 | 106 | 174 | 214 | 13 | 16 | 27 | 33 | 42 | 59 | 88 | 122 | ' | ' | -77 | -16 | -136 | -14 | -34 | 31 | -53 | 85 | -15 | -15 | -30 | -28 | -62 | -53 | -122 | -95 | 141 | 202 | 291 | 450 | 122 | 178 | 255 | 372 | 555 | 758 | 1,167 | 1,567 | 1,476 | 1,345 | 2,938 | 2,651 | 1,543 | 1,821 | 3,191 | 3,694 | 584 | 551 | 1,167 | 1,091 | ' |
Amount of Deferred Loss Expected to be Amortized over the Next 12 Months | ' | ' | 19,822 | ' | ' | ' | 3 | ' | ' | ' | 14 | ' | ' | ' | 26 | ' | ' | ' | 17 | ' | ' | ' | 51 | ' | ' | ' | 486 | 488 | -30 | ' | ' | ' | -114 | ' | ' | ' | -61 | ' | ' | ' | -238 | ' | ' | ' | 44 | ' | ' | ' | 394 | ' | ' | ' | 1,730 | ' | ' | ' | 499 | ' | ' | ' | 3,387 | ' | ' | ' | 793 | ' | ' | ' | 12,333 |
Net interest settlements on active interest rate derivatives expected to be amortized over the next 12 months, net of tax | 1,045 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Net interest settlements on active interest rate derivatives expected to be amortized over the next 12 months, tax | 679 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Deferred losses on the Company's terminated derivatives expected to be amortized over the next twelve months, net of tax | 12,014 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Deferred losses on the Company's terminated derivatives expected to be amortized over the next twelve months, tax | $7,808 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |