Subsequent Events (Narrative) (Details) $ / shares in Units, shares in Thousands | May 04, 2018USD ($)shares | May 03, 2018$ / shares | May 01, 2018USD ($) | Apr. 27, 2018USD ($)extensionlender | Apr. 02, 2018USD ($) | Mar. 31, 2018USD ($)shares | Mar. 31, 2018USD ($)extension$ / shares | Mar. 31, 2017USD ($)$ / shares | Apr. 26, 2018USD ($) | Mar. 15, 2018$ / shares |
Subsequent Event [Line Items] | | | | | | | | | | |
Distributions paid in cash | | | | | | | $ 9,333,000 | $ 5,977,000 | | |
Common stock issued through distribution reinvestment plan | | | | | | | $ 9,920,000 | $ 7,001,000 | | |
Distributions declared per common share | $ / shares | | | | | | | $ 0.15 | $ 0.16 | | |
Credit facility, maximum commitments available | | | | | | $ 427,371,000 | $ 427,371,000 | | | |
Common Stock [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock issued through distribution reinvestment plan | | | | | | | $ 11,000 | | | |
Revolving Line of Credit [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, maturity date | | | | | | | Dec. 22, 2018 | | | |
Credit facility, number of maturity extension periods | extension | | | | | | | 2 | | | |
Credit facility, extension period | | | | | | | 12 months | | | |
Class A shares [Member] | Follow-On Offering [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering, price per share (in dollars per share) | $ / shares | | | | | | | | | | $ 10.200 |
Class I shares [Member] | Follow-On Offering [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering, price per share (in dollars per share) | $ / shares | | | | | | | | | | 9.273 |
Class T2 shares [Member] | Follow-On Offering [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering, price per share (in dollars per share) | $ / shares | | | | | | | | | | $ 9.714 |
Class A, I, T and T2 shares [Member] | Common Stock [Member] | the Offerings [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering including DRIP, shares issued | shares | | | | | | 131,171 | | | | |
Common stock offering including DRIP, gross proceeds raised | | | | | | $ 1,281,654,000 | | | | |
Subsequent Event [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, number of lenders added | lender | | | | 7 | | | | | | |
Credit facility, maximum commitments available | | | | $ 700,000,000 | | | | | $ 425,000,000 | |
Credit facility, maximum commitments available after available increase | | | | $ 1,000,000,000 | | | | | | |
Credit facility, threshold percentage for unused portion of lenders' commitments | | | | 50.00% | | | | | | |
Subsequent Event [Member] | Carter Validus Real Estate Management Services II, LLC [Member] | Management Agreement [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Term of agreement from effective date | | 1 year | | | | | | | | |
Effective date of agreement | | May 19, 2018 | | | | | | | | |
Subsequent Event [Member] | Carter Validus Advisors II, LLC [Member] | Advisory Agreement [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Term of agreement from effective date | | 1 year | | | | | | | | |
Effective date of agreement | | Jun. 10, 2018 | | | | | | | | |
Subsequent Event [Member] | Minimum [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, unused portion, commitment fee percentage | | | | 0.15% | | | | | | |
Subsequent Event [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, basis spread on variable rate | | | | 1.75% | | | | | | |
Subsequent Event [Member] | Minimum [Member] | Base Rate [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, basis spread on variable rate | | | | 0.75% | | | | | | |
Subsequent Event [Member] | Maximum [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, unused portion, commitment fee percentage | | | | 0.25% | | | | | | |
Subsequent Event [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, basis spread on variable rate | | | | 2.25% | | | | | | |
Subsequent Event [Member] | Maximum [Member] | Base Rate [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, basis spread on variable rate | | | | 1.25% | | | | | | |
Subsequent Event [Member] | Revolving Line of Credit [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, maximum commitments available | | | | $ 450,000,000 | | | | | | |
Credit facility, maturity date | | | | Apr. 27, 2022 | | | | | | |
Credit facility, number of maturity extension periods | extension | | | | 1 | | | | | | |
Credit facility, extension period | | | | 12 months | | | | | | |
Subsequent Event [Member] | Term Loan [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Credit facility, maximum commitments available | | | | $ 250,000,000 | | | | | | |
Credit facility, maturity date | | | | Apr. 27, 2023 | | | | | | |
Subsequent Event [Member] | Class A shares [Member] | Common Stock [Member] | the Offerings [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering including DRIP, shares issued | shares | 86,019 | | | | | | | | | |
Common stock offering including DRIP, gross proceeds raised | $ 851,541,000 | | | | | | | | | |
Subsequent Event [Member] | Class I shares [Member] | Common Stock [Member] | the Offerings [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering including DRIP, shares issued | shares | 9,018 | | | | | | | | | |
Common stock offering including DRIP, gross proceeds raised | $ 82,505,000 | | | | | | | | | |
Subsequent Event [Member] | Class T shares [Member] | Common Stock [Member] | the Offerings [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering including DRIP, shares issued | shares | 37,868 | | | | | | | | | |
Common stock offering including DRIP, gross proceeds raised | $ 363,904,000 | | | | | | | | | |
Subsequent Event [Member] | Class T2 shares [Member] | Common Stock [Member] | the Offerings [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering including DRIP, shares issued | shares | 713 | | | | | | | | | |
Common stock offering including DRIP, gross proceeds raised | $ 6,914,000 | | | | | | | | | |
Subsequent Event [Member] | Common Class A, I and T2 Shares [Member] | Common Stock [Member] | Follow-On Offering [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering, value remaining | 938,775,000 | | | | | | | | | |
Subsequent Event [Member] | Class A, I, T and T2 shares [Member] | Common Stock [Member] | DRIP Offering [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Common stock offering, value remaining | $ 80,094,000 | | | | | | | | | |
Subsequent Event [Member] | March 1, 2018 To March 31, 2018 [Member] | Class A shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Aggregate distributions paid | | | | | $ 4,553,000 | | | | | |
Distributions paid in cash | | | | | 2,345,000 | | | | | |
Common stock issued through distribution reinvestment plan | | | | | 2,208,000 | | | | | |
Subsequent Event [Member] | March 1, 2018 To March 31, 2018 [Member] | Class I shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Aggregate distributions paid | | | | | 449,000 | | | | | |
Distributions paid in cash | | | | | 249,000 | | | | | |
Common stock issued through distribution reinvestment plan | | | | | 200,000 | | | | | |
Subsequent Event [Member] | March 1, 2018 To March 31, 2018 [Member] | Class T shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Aggregate distributions paid | | | | | 1,758,000 | | | | | |
Distributions paid in cash | | | | | 744,000 | | | | | |
Common stock issued through distribution reinvestment plan | | | | | $ 1,014,000 | | | | | |
Subsequent Event [Member] | April 1, 2018 To April 30, 2018 [Member] | Class A shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Aggregate distributions paid | | | $ 4,420,000 | | | | | | | |
Distributions paid in cash | | | 2,269,000 | | | | | | | |
Common stock issued through distribution reinvestment plan | | | 2,151,000 | | | | | | | |
Subsequent Event [Member] | April 1, 2018 To April 30, 2018 [Member] | Class I shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Aggregate distributions paid | | | 459,000 | | | | | | | |
Distributions paid in cash | | | 253,000 | | | | | | | |
Common stock issued through distribution reinvestment plan | | | 206,000 | | | | | | | |
Subsequent Event [Member] | April 1, 2018 To April 30, 2018 [Member] | Class T shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Aggregate distributions paid | | | 1,711,000 | | | | | | | |
Distributions paid in cash | | | 722,000 | | | | | | | |
Common stock issued through distribution reinvestment plan | | | 989,000 | | | | | | | |
Subsequent Event [Member] | April 1, 2018 To April 30, 2018 [Member] | Class T2 shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Aggregate distributions paid | | | 15,000 | | | | | | | |
Distributions paid in cash | | | 5,000 | | | | | | | |
Common stock issued through distribution reinvestment plan | | | $ 10,000 | | | | | | | |
Subsequent Event [Member] | June 1, 2018 To August 31, 2018 [Member] | Class A shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Number of days, distribution calculation | | 365 days | | | | | | | | |
Distributions declared per common share | $ / shares | | $ 0.001788493 | | | | | | | | |
Annualized distribution rate | | 6.40% | | | | | | | | |
Common stock offering, price per share (in dollars per share) | $ / shares | | $ 10.200 | | | | | | | | |
Subsequent Event [Member] | June 1, 2018 To August 31, 2018 [Member] | Class I shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Number of days, distribution calculation | | 365 days | | | | | | | | |
Distributions declared per common share | $ / shares | | $ 0.001788493 | | | | | | | | |
Annualized distribution rate | | 7.04% | | | | | | | | |
Common stock offering, price per share (in dollars per share) | $ / shares | | $ 9.273 | | | | | | | | |
Subsequent Event [Member] | June 1, 2018 To August 31, 2018 [Member] | Class T shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Number of days, distribution calculation | | 365 days | | | | | | | | |
Distributions declared per common share | $ / shares | | $ 0.001519750 | | | | | | | | |
Annualized distribution rate | | 5.68% | | | | | | | | |
Common stock offering, price per share (in dollars per share) | $ / shares | | $ 9.766 | | | | | | | | |
Subsequent Event [Member] | June 1, 2018 To August 31, 2018 [Member] | Class T2 shares [Member] | | | | | | | | | | |
Subsequent Event [Line Items] | | | | | | | | | | |
Number of days, distribution calculation | | 365 days | | | | | | | | |
Distributions declared per common share | $ / shares | | $ 0.001522356 | | | | | | | | |
Annualized distribution rate | | 5.72% | | | | | | | | |
Common stock offering, price per share (in dollars per share) | $ / shares | | $ 9.714 | | | | | | | | |