Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Total [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount		$ 682,500
Fair value asset (liability)		(6,158)	$ 10,006
Interest Rate Swap #1 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount		$ 212,500
Origination Date		May 21, 2015
Maturity date		May 18, 2020
Swap fixed interest rate		1.58%
Fair value asset (liability)		$ 565	2,744
Interest Rate Swap #2 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount		$ 110,000
Origination Date		Jul. 02, 2015
Maturity date		May 18, 2020
Swap fixed interest rate		1.62%
Fair value asset (liability)		$ 255	1,361
Interest Rate Swap #3 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount		$ 50,000
Origination Date		Apr. 07, 2016
Maturity date		Mar. 31, 2021
Swap fixed interest rate		1.09%
Fair value asset (liability)		$ 519	1,519
Interest Rate Swap #4 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount		$ 100,000
Origination Date		Apr. 07, 2016
Maturity date		Mar. 31, 2023
Swap fixed interest rate		1.33%
Fair value asset (liability)		$ 1,010	4,477
Interest Rate Swap #5 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount		$ 75,000
Origination Date		May 31, 2017
Maturity date		Jun. 30, 2024
Swap fixed interest rate		1.96%
Fair value asset (liability)		$ (1,200)	1,905
Interest Rate Swap #6 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount		$ 10,000
Origination Date		Aug. 10, 2017
Maturity date		Jun. 30, 2024
Swap fixed interest rate		2.01%
Fair value asset (liability)		$ (180)	226
Interest Rate Swap #7 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount	[1]	$ 50,000
Origination Date		Jun. 01, 2018
Maturity date		Jun. 30, 2025
Swap fixed interest rate		2.89%
Fair value asset (liability)		$ (3,551)	(1,276)
Interest Rate Swap #8 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount	[2]	$ 25,000
Origination Date		Dec. 06, 2018
Maturity date		Jun. 30, 2025
Swap fixed interest rate		2.75%
Fair value asset (liability)		$ (1,466)	(379)
Interest Rate Swap #9 [Member] | Designated as Hedging Instrument [Member]
Fair Value of Financial Instruments (Details) - Schedule of Interest Rate Swap Agreements [Line Items]
Notional amount	[3]	$ 50,000
Origination Date		Dec. 07, 2018
Maturity date		Jan. 31, 2024
Swap fixed interest rate		2.72%
Fair value asset (liability)		$ (2,110)	$ (571)

[1] In June 2018 the Company entered into a forward interest rate swap agreement with a commercial bank, which beginning January 31, 2019 effectively fixes the interest rate on $50 million of the Company's variable-rate debt.

[2] In December 2018 the Company entered into a forward interest rate swap agreement with a commercial bank, which beginning January 31, 2020 will effectively fix the interest rate on $25 million of the Company's variable-rate debt.

[3] In December 2018 the Company entered into a forward interest rate swap agreement with a commercial bank, which beginning May 18, 2020 will effectively fix the interest rate on $50 million of the Company's variable-rate debt.