Related-Party Transactions and Arrangements (Schedule of Related Party Transactions) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
$ 5,513
|
$ 8,288
|
$ 31,633
|
$ 65,351
|
$ 55,111
|
| Payable |
11,356
|
|
12,427
|
15,249
|
|
| Carter Validus Advisors II, LLC And/Or Its Affiliates [Member] | Other Offering Costs Reimbursement [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
0
|
647
|
2,154
|
4,704
|
4,428
|
| Payable |
0
|
|
89
|
167
|
|
| Carter Validus Advisors II, LLC And/Or Its Affiliates [Member] | Acquisition Fees [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
0
|
1,019
|
4,226
|
11,936
|
11,515
|
| Payable |
0
|
|
32
|
5
|
|
| Carter Validus Advisors II, LLC And/Or Its Affiliates [Member] | Asset Management Fees [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
3,494
|
3,099
|
13,114
|
9,963
|
4,925
|
| Payable |
1,165
|
|
1,182
|
1,017
|
|
| Carter Validus Advisors II, LLC And/Or Its Affiliates [Member] | Operating Expense Reimbursement [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
730
|
312
|
1,804
|
1,543
|
1,257
|
| Payable |
224
|
|
421
|
182
|
|
| SC Distributors, LLC [Member] | Selling Commissions and Dealer Manager Fees [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
0
|
1,689
|
4,836
|
22,713
|
24,546
|
| Payable |
0
|
|
0
|
0
|
|
| SC Distributors, LLC [Member] | Distribution and Servicing Fees [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
|
374
|
368
|
9,617
|
6,213
|
| Incurred |
(52)
|
|
|
|
|
| Payable |
9,300
|
|
10,218
|
13,376
|
|
| Carter Validus Real Estate Management Services II, LLC [Member] | Property Management Fees [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
1,209
|
1,037
|
4,391
|
3,249
|
1,473
|
| Payable |
483
|
|
420
|
463
|
|
| Carter Validus Real Estate Management Services II, LLC [Member] | Leasing Commission Fees [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
3
|
0
|
497
|
907
|
0
|
| Payable |
3
|
|
25
|
0
|
|
| Carter Validus Real Estate Management Services II, LLC [Member] | Construction Management Fees [Member] |
|
|
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
|
|
| Incurred |
129
|
$ 111
|
243
|
719
|
$ 754
|
| Payable |
$ 181
|
|
$ 40
|
$ 39
|
|