Derivatives and Hedging Activities (Details 4) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | |
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Jan. 10, 2013 |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Net interest settlements on active interest rate derivatives expected to be amortized over the next 12 months, net of tax | | | $ 721 | | |
Net interest settlements on active interest rate derivatives expected to be amortized over the next 12 months, tax | | | 467 | | |
Deferred losses on the Company's terminated derivatives expected to be amortized over the next twelve months, net of tax | | | 11,063 | | |
Deferred losses on the Company's terminated derivatives expected to be amortized over the next twelve months, tax | | | $ 7,154 | | |
Interest rate swap | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Fixed Rate % | | | | | 0.756% |
Interest rate swap | Designated as hedge | Cash flow hedge | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Fixed Rate % | 0.756% | | 0.756% | | |
Deferred Loss Upon Termination | $ 127,529 | | $ 127,529 | | |
Unamortized Deferred (Gain) Loss | 37,552 | | 37,552 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | 5,110 | $ 4,389 | 10,526 | $ 8,995 | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | 18,217 | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.299%, original maturity of Oct-2017 | | | | | |
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 | | |
Fixed Rate % | 5.299% | | 5.299% | | |
Deferred Loss Upon Termination | $ 1,853 | | $ 1,853 | | |
Unamortized Deferred (Gain) Loss | (8) | | (8) | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | 3 | | 7 | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | (4) | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.307%, original maturity of Jul-2017 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 200,000 | | $ 200,000 | | |
Fixed Rate % | 5.307% | | 5.307% | | |
Deferred Loss Upon Termination | $ 6,412 | | $ 6,412 | | |
Unamortized Deferred (Gain) Loss | (23) | | (23) | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | (1) | 13 | | 31 | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | (14) | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.58%, original maturity of Jul-2014 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 163,333 | | $ 163,333 | | |
Fixed Rate % | 5.58% | | 5.58% | | |
Deferred Loss Upon Termination | $ 3,773 | | $ 3,773 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | 85 | | 174 | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.512%, original maturity of Oct-2014, one | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 150,000 | | $ 150,000 | | |
Fixed Rate % | 5.512% | | 5.512% | | |
Deferred Loss Upon Termination | $ 1,711 | | $ 1,711 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | 13 | | 27 | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.512%, original maturity of Oct-2014, two | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 150,000 | | $ 150,000 | | |
Fixed Rate % | 5.512% | | 5.512% | | |
Deferred Loss Upon Termination | $ 3,498 | | $ 3,498 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | 42 | | 88 | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.436%, original maturity of Oct-2017, one | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 480,088 | | $ 480,088 | | |
Fixed Rate % | 5.436% | | 5.436% | | |
Deferred Loss Upon Termination | $ 1,711 | | $ 1,711 | | |
Unamortized Deferred (Gain) Loss | 1,225 | | 1,225 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | 162 | | 341 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | 583 | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.436%, original maturity of Oct-2017, two | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 480,088 | | $ 480,088 | | |
Fixed Rate % | 5.436% | | 5.436% | | |
Deferred Loss Upon Termination | $ 1,526 | | $ 1,526 | | |
Unamortized Deferred (Gain) Loss | 1,038 | | 1,038 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | 156 | | 342 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | 621 | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4.605%, original maturity of Jul-2014 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 163,333 | | $ 163,333 | | |
Fixed Rate % | 4.605% | | 4.605% | | |
Deferred Loss Upon Termination | $ 2,082 | | $ 2,082 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | (77) | | (136) | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4.743%, original maturity of Oct-2014 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 332,525 | | $ 332,525 | | |
Fixed Rate % | 4.743% | | 4.743% | | |
Deferred Loss Upon Termination | $ 7,641 | | $ 7,641 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | (34) | | (53) | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4.305%, original maturity of Oct-2017 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 58,238 | | $ 58,238 | | |
Fixed Rate % | 4.305% | | 4.305% | | |
Deferred Loss Upon Termination | $ 862 | | $ 862 | | |
Unamortized Deferred (Gain) Loss | (73) | | (73) | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | (16) | (15) | (30) | (30) | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | (53) | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4.365%, original maturity of Jul-2017 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 193,333 | | $ 193,333 | | |
Fixed Rate % | 4.365% | | 4.365% | | |
Deferred Loss Upon Termination | $ 3,265 | | $ 3,265 | | |
Unamortized Deferred (Gain) Loss | (226) | | (226) | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | (56) | (62) | (114) | (122) | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | (163) | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.526%, original maturity of Jul-2014 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 37,000 | | $ 37,000 | | |
Fixed Rate % | 5.526% | | 5.526% | | |
Deferred Loss Upon Termination | $ 3,122 | | $ 3,122 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | 141 | | 291 | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 3.989%, original maturity of Oct-2017 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 53,286 | | $ 53,286 | | |
Fixed Rate % | 3.989% | | 3.989% | | |
Deferred Loss Upon Termination | $ 2,048 | | $ 2,048 | | |
Unamortized Deferred (Gain) Loss | 356 | | 356 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | 86 | 122 | 179 | 255 | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | 270 | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4.033%, original maturity of Jul-2017 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 181,667 | | $ 181,667 | | |
Fixed Rate % | 4.033% | | 4.033% | | |
Deferred Loss Upon Termination | $ 8,538 | | $ 8,538 | | |
Unamortized Deferred (Gain) Loss | 1,224 | | 1,224 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | 357 | 555 | 763 | 1,167 | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | 925 | | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4.328%, original maturity of Jul-2014 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 43,333 | | $ 43,333 | | |
Fixed Rate % | 4.328% | | 4.328% | | |
Deferred Loss Upon Termination | $ 11,033 | | $ 11,033 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | 1,476 | | 2,938 | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4.147%, original maturity of Oct-2014 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 211,567 | | $ 211,567 | | |
Fixed Rate % | 4.147% | | 4.147% | | |
Deferred Loss Upon Termination | $ 17,002 | | $ 17,002 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | 1,543 | | 3,191 | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 4%, original maturity of Oct-2014 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 150,000 | | $ 150,000 | | |
Fixed Rate % | 4.00% | | 4.00% | | |
Deferred Loss Upon Termination | $ 5,080 | | $ 5,080 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | | $ 584 | | $ 1,167 | |
Interest rate swap | Designated as hedge | Cash flow hedge | Terminated derivative at fixed rate of 5.174%, original maturity of Oct-2017 | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | |
Original Maximum Notional Amount | $ 427,407 | | $ 427,407 | | |
Fixed Rate % | 5.174% | | 5.174% | | |
Deferred Loss Upon Termination | $ 46,372 | | $ 46,372 | | |
Unamortized Deferred (Gain) Loss | 34,039 | | 34,039 | | |
Amount of Deferred (Gain) Loss Amortized (including Accelerated Amortization) into Interest Expense | $ 4,422 | | 9,045 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized over the Next 12 Months | | | $ 16,052 | | |