2. GOODWILL AND OTHER INTANGIBLE ASSETS

The Company has recorded goodwill as a result of its various business combinations. Goodwill is recorded as the difference, if any, between the aggregate consideration paid for an acquisition and the fair value of the tangible assets and intangible assets acquired net of liabilities assumed, including noncontrolling interests. Changes in the Company's goodwill balances from January 1, 2026 to June 30, 2026 are as follows (in thousands):

The Company has also recorded other finite and indefinite-lived intangible assets as a result of its various business combinations. The Company's intangible assets include facility management contracts and trade names and technology, as follows (in thousands):

Amortization expense was $1.7 million and $2.3 million for the three months ended June 30, 2026 and 2025, respectively. Amortization expense was $3.7 million and $4.6 million for the six months ended June 30, 2026 and 2025, respectively. The Company records the costs associated with renewal and extension of facility management contracts as expenses in the period they are incurred. As of June 30, 2026, the weighted average period before the next contract renewal or extension for the acquired facility management contracts was approximately 3.0 years.