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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]  
Summary of Aggregate Amount and Estimated Net Fair Value of Our Derivative Instruments

The following table summarizes the aggregate notional amount and estimated net fair value of our derivative instruments as of December 31, 2018 and 2017:

 

 

December 31, 2018

 

 

December 31, 2017

 

 

 

Notional

 

 

Fair Value of

Assets

 

 

Fair Value of

Liabilities

 

 

Notional

 

 

Fair Value of

Assets

 

 

Fair Value of

Liabilities

 

Cash flow hedges:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interest rate swap

 

$

150,000

 

 

$

4,751

 

 

$

 

 

$

150,000

 

 

$

4,700

 

 

$

 

Interest rate collars

 

 

250,000

 

 

 

3,556

 

 

 

 

 

 

50,000

 

 

 

1,297

 

 

 

 

 

 

 

400,000

 

 

 

8,307

 

 

 

 

 

 

200,000

 

 

 

5,997

 

 

 

 

Freestanding derivatives:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interest rate collar

 

 

 

 

 

 

 

 

 

 

 

50,000

 

 

 

1,294

 

 

 

 

Total

 

$

400,000

 

 

$

8,307

 

 

$

 

 

$

250,000

 

 

$

7,291

 

 

$