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Noncontrolling Interest
6 Months Ended
Jun. 30, 2021
Noncontrolling Interest [Abstract]  
Noncontrolling Interest Noncontrolling Interest
The following table summarizes the activity for noncontrolling interest in the Company for the six months ended June 30, 2021 and the year ended December 31, 2020.

Noncontrolling InterestLTIP UnitsOther
Common Units
Total
Noncontrolling Common Units
Noncontrolling Interest
Balance at December 31, 20191,697,358 2,039,494 3,736,852 2.5 %
Granted/Issued278,806 — 278,806 N/A
Forfeited— — — N/A
Conversions from LTIP units to Other Common Units(283,741)283,741 — N/A
Redemptions from Other Common Units to common stock— (730,420)(730,420)N/A
Balance at December 31, 20201,692,423 1,592,815 3,285,238 2.0 %
Granted/Issued405,844 — 405,844 N/A
Forfeited— — — N/A
Conversions from LTIP units to Other Common Units(97,159)97,159 — N/A
Redemptions from Other Common Units to common stock— (119,334)(119,334)N/A
Balance at June 30, 20212,001,108 1,570,640 3,571,748 2.2 %

LTIP Units

LTIP units granted on January 7, 2021 to non-employee, independent directors, subject to the recipient’s continued service, will vest on January 1, 2022. LTIP units granted on January 7, 2021 to certain senior executive officers and senior employees, subject to the recipient’s continued employment, will vest quarterly over four years, with the first vesting date having been March 31, 2021. Refer to Note 8 for a discussion of the LTIP units granted on January 7, 2021 pursuant to the 2018 performance units.

The fair value of the LTIP units at the date of grant was determined by a lattice-binomial option-pricing model based on a Monte Carlo simulation. The fair value of the LTIP units are based on Level 3 inputs and are non-recurring fair value measurements. The following table summarizes the assumptions used in valuing such LTIP units granted during the six months ended June 30, 2021 (excluding those LTIP units granted pursuant to the 2018 performance units; refer to Note 8 for details).

LTIP UnitsAssumptions
Grant dateJanuary 7, 2021
Expected term (years)10
Expected volatility34.0 %
Expected dividend yield5.0 %
Risk-free interest rate0.229 %
Fair value of LTIP units at issuance (in thousands)$4,316 
LTIP units at issuance153,430 
Fair value unit price per LTIP unit at issuance$28.13 
The following table summarizes activity related to the Company’s unvested LTIP units for the six months ended June 30, 2021 and the year ended December 31, 2020.

Unvested LTIP UnitsLTIP UnitsWeighted Average Grant Date Fair Value per Share
Balance at December 31, 2019227,348 $23.37 
Granted278,806 $29.47 
Vested(294,706)$26.87 
Forfeited— $— 
Balance at December 31, 2020211,448 $26.54 
Granted405,844 $28.13 
Vested(228,821)$27.33 
Forfeited— $— 
Balance at June 30, 2021388,471 $27.74 

The unrecognized compensation expense associated with the Company’s LTIP units at June 30, 2021 was approximately $4.1 million and is expected to be recognized over a weighted average period of approximately 2.3 years.

The following table summarizes the fair value at vesting for the LTIP units that vested during the three and six months ended June 30, 2021 and 2020.

 Three months ended June 30,Six months ended June 30,
Vested LTIP units2021202020212020
Vested LTIP units45,335 43,958 228,821 174,145 
Fair value of vested LTIP units (in thousands)$1,686 $1,213 $7,369 $5,074