Bank and Other Notes Payable	9 Months Ended
Sep. 30, 2018
Debt Disclosure [Abstract]
Bank and Other Notes Payable	Bank and Other Notes Payable: Bank and other notes payable consist of the following: Line of Credit: The Company has a $1,500,000 revolving line of credit that bears interest at LIBOR plus a spread of 1.30% to 1.90%, depending on the Company's overall leverage level, and matures on July 6, 2020 with a one-year extension option. The line of credit can be expanded, depending on certain conditions, up to a total facility of $2,000,000. Based on the Company's leverage level as of September 30, 2018, the borrowing rate on the facility was LIBOR plus 1.45%. The Company has an interest rate swap agreement that effectively converts $400,000 of the outstanding balance from floating rate debt of LIBOR plus 1.45% to fixed rate debt of 4.30% until September 14, 2021 (See Note 5—Derivative Instruments and Hedging Activities). As of September 30, 2018 and December 31, 2017, borrowings under the line of credit were $790,000 and $935,000, respectively, less unamortized deferred finance costs of $5,781 and $7,548, respectively, at a total interest rate of 4.08% and 3.13%, respectively. As of September 30, 2018 and December 31, 2017, the Company's availability under the line of credit for additional borrowings was $709,720 and $504,412, respectively, The estimated fair value (Level 2 measurement) of the line of credit at September 30, 2018 and December 31, 2017 was $791,233 and $919,158, respectively, based on a present value model using a credit interest rate spread offered to the Company for comparable debt. Prasada Note: On March 29, 2013, the Company issued a $13,330 note payable that bears interest at 5.25% and matures on May 30, 2021. The note payable is collateralized by a portion of a development reimbursement agreement with the City of Surprise, Arizona. At September 30, 2018 and December 31, 2017, the note had a balance of $3,903 and $4,732, respectively. The estimated fair value (Level 2 measurement) of the note at September 30, 2018 and December 31, 2017 was $3,900 and $4,717, respectively, based on current interest rates for comparable notes. Fair value was determined using a present value model and an interest rate that included a credit value adjustment based on the estimated value of the collateral for the underlying debt. As of September 30, 2018 and December 31, 2017, the Company was in compliance with all applicable financial loan covenants.

Bank and Other Notes Payable:

Bank and other notes payable consist of the following:

Line of Credit:

The Company has a $1,500,000 revolving line of credit that bears interest at LIBOR plus a spread of 1.30% to 1.90%, depending on the Company's overall leverage level, and matures on July 6, 2020 with a one-year extension option. The line of credit can be expanded, depending on certain conditions, up to a total facility of $2,000,000.

Based on the Company's leverage level as of September 30, 2018, the borrowing rate on the facility was LIBOR plus 1.45%. The Company has an interest rate swap agreement that effectively converts $400,000 of the outstanding balance from floating rate debt of LIBOR plus 1.45% to fixed rate debt of 4.30% until September 14, 2021 (See Note 5—Derivative Instruments and Hedging Activities). As of September 30, 2018 and December 31, 2017, borrowings under the line of credit were $790,000 and $935,000, respectively, less unamortized deferred finance costs of $5,781 and $7,548, respectively, at a total interest rate of 4.08% and 3.13%, respectively. As of September 30, 2018 and December 31, 2017, the Company's availability under the line of credit for additional borrowings was $709,720 and $504,412, respectively, The estimated fair value (Level 2 measurement) of the line of credit at September 30, 2018 and December 31, 2017 was $791,233 and $919,158, respectively, based on a present value model using a credit interest rate spread offered to the Company for comparable debt.

Prasada Note:

On March 29, 2013, the Company issued a $13,330 note payable that bears interest at 5.25% and matures on May 30, 2021. The note payable is collateralized by a portion of a development reimbursement agreement with the City of Surprise, Arizona. At September 30, 2018 and December 31, 2017, the note had a balance of $3,903 and $4,732, respectively. The estimated fair value (Level 2 measurement) of the note at September 30, 2018 and December 31, 2017 was $3,900 and $4,717, respectively, based on current interest rates for comparable notes. Fair value was determined using a present value model and an interest rate that included a credit value adjustment based on the estimated value of the collateral for the underlying debt.

As of September 30, 2018 and December 31, 2017, the Company was in compliance with all applicable financial loan covenants.