STOCKHOLDERS' EQUITY - Summary of Company's Offerings (Detail) shares in Thousands, $ in Thousands	Dec. 31, 2019 USD ($) shares
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 517,742
Number of shares sold | shares	49,475
Primary Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 505,748
Number of shares sold | shares	48,307
DRIP Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 11,494
Number of shares sold | shares	1,145
Private Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 500
Number of shares sold | shares	14
Stock Dividends
Stockholders Equity [Line Items]
Number of shares sold | shares	9
Class T
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 476,707
Number of shares sold | shares	45,400
Class T | Primary Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 465,829
Number of shares sold | shares	44,316
Class T | DRIP Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 10,816
Number of shares sold | shares	1,077
Class T | Private Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 62
Number of shares sold | shares	7
Class T | Stock Dividends
Stockholders Equity [Line Items]
Number of shares sold | shares	0
Class W
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 27,896
Number of shares sold | shares	2,781
Class W | Primary Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 27,526
Number of shares sold | shares	2,738
Class W | DRIP Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 370
Number of shares sold | shares	37
Class W | Private Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 0
Number of shares sold | shares	0
Class W | Stock Dividends
Stockholders Equity [Line Items]
Number of shares sold | shares	6
Class I
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 12,763
Number of shares sold | shares	1,294
Class I | Primary Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 12,393
Number of shares sold | shares	1,253
Class I | DRIP Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 308
Number of shares sold | shares	31
Class I | Private Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 62
Number of shares sold | shares	7
Class I | Stock Dividends
Stockholders Equity [Line Items]
Number of shares sold | shares	3
Notes to Stockholders
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 376
Notes to Stockholders | Primary Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	0
Notes to Stockholders | DRIP Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	0
Notes to Stockholders | Private Offering
Stockholders Equity [Line Items]
Amount of gross proceeds raised | $	$ 376