Fair Value Measurements - Schedule of Fair Values of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities (included in "other assets")	$ 21,263	$ 22,660
Interest rate swap assets (included in "other assets")		16,859
Total assets	21,263	39,519
Interest rate swap liabilities (included in "other liabilities")	11,691	48
Total liabilities	11,691	48
Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities (included in "other assets")	21,263	22,660
Total assets	21,263	22,660
Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate swap assets (included in "other assets")		16,859
Total assets		16,859
Interest rate swap liabilities (included in "other liabilities")	11,691	48
Total liabilities	$ 11,691	$ 48