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General and Limited Partners’ Capital Account, Distribution Per Weighted Average Unit

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Partners Capital Equivalent In Common Shares

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Face amount or stated value per share of common stock.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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- Definition

Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The number of real estate properties owned as of the balance sheet date.

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The number of states the entity operates in as of the balance sheet date.

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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Price of a single share of a number of saleable stocks of a company.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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The Company and Financial Statement Presentation - Additional Information (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) state Property $ / shares	Sep. 30, 2017 USD ($) $ / shares	Sep. 29, 2018	Dec. 31, 2017 $ / shares
Variable Interest Entity [Line Items]
Number of properties \| Property	145
Number of states in which entity has interests \| state	35
Common shares, par value (in dollars per share) \| $ / shares	$ 0.0001			$ 0.0001
Partners capital equivalent in common shares	1.13
Net cash provided by (used in) operating activities	$ 169,656	$ 172,407
Net cash provided by (used in) investing activities	577,450	(228,946)
Net cash provided by (used in) financing activities	$ (467,275)	114,251
NNN Office Joint Venture [Member]
Variable Interest Entity [Line Items]
Ownership percentage	20.00%
Accounting Standards Update 2016-15 [Member]
Variable Interest Entity [Line Items]
Net cash provided by (used in) operating activities		(174)
Net cash provided by (used in) investing activities		5,605
Net cash provided by (used in) financing activities		(1,627)
LCIF [Member]
Variable Interest Entity [Line Items]
Percentage of outstanding units owned	96.00%
Number of properties \| Property	26
Number of states in which entity has interests \| state	17
Common shares, par value (in dollars per share) \| $ / shares	$ 0.0001
Partners capital equivalent in common shares	1.13
Distributions	$ 44,858	$ 48,573
Distribution per weighted average unit (in dollars per share) \| $ / shares	$ 0.56	$ 0.58
Net cash provided by (used in) operating activities	$ 28,127	$ 32,685
Net cash provided by (used in) investing activities	127,004	(44,423)
Net cash provided by (used in) financing activities	$ (107,612)	$ 26,589
LCIF [Member] \| NNN Office Joint Venture [Member]
Variable Interest Entity [Line Items]
Ownership percentage			13.74%
LCIF [Member] \| Limited Partner [Member]
Variable Interest Entity [Line Items]
Share price (in dollars per share) \| $ / shares	$ 8.30
Equity, fair value disclosure, portion of limited partner	$ 29,964
Variable Interest Entity, Primary Beneficiary [Member] \| LCIF [Member]
Variable Interest Entity [Line Items]
VIE, ownership percentage	96.00%