Derivatives and Hedging Activities - Deferred (Gains) and Losses Terminated Interest Rate (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | | |
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Feb. 04, 2016 | 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 | | | $ 645 | | | |
Net interest settlements on active interest rate derivatives expected to be amortized over the next 12 months, tax | | | 417 | | | |
Deferred losses on the Company's terminated derivatives expected to be amortized over the next twelve months, net of tax | | | 8,609 | | | |
Deferred losses on the Company's terminated derivatives expected to be amortized over the next twelve months, tax | | | 5,565 | | | |
Interest rate swap | | | | | | |
Deferred (gains) and losses for the terminated interest rate derivatives and the related amortization into interest expense | | | | | | |
Fixed Rate % | | | | | 1.063% | 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 | | | | | | |
Deferred Loss Upon Termination | $ 72,587 | | 72,587 | | | |
Un-amortized Deferred (Gain) or Loss | 15,335 | | 15,335 | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | 3,998 | $ 4,981 | 12,564 | $ 15,507 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | 14,174 | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | (1) | | (1) | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | (2) | (1) | (5) | (1) | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | (1) | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | (6) | | (6) | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | (4) | (2) | (11) | (2) | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | (6) | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | 506 | | 506 | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | 136 | 167 | 398 | 508 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | 467 | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | 305 | | 305 | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | 112 | 188 | 377 | 530 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | 291 | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | (8) | | (8) | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | (12) | (14) | (37) | (44) | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | (8) | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | (38) | | (38) | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | (25) | (49) | (96) | (163) | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | (38) | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | 32 | | 32 | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | 51 | 80 | 171 | 259 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | 32 | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | 175 | | 175 | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | 125 | 306 | 491 | 1,069 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | 175 | | | |
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 | | | |
Un-amortized Deferred (Gain) or Loss | 14,370 | | 14,370 | | | |
Amount of Deferred (Gain)Loss Amortized (including Accelerated Amortization) Into Interest Expense | $ 3,617 | $ 4,306 | 11,276 | $ 13,351 | | |
Amount of Deferred (Gain) Loss Expected to be Amortized Over the Next Twelve Months | | | $ 13,262 | | | |