Collaborative Investments	6 Months Ended
Jun. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Collaborative Investments	Collaborative Investments On May 12, 2020, a subsidiary of IDEX entered into a joint venture agreement with a third party to form a limited liability company (the “Joint Venture”) that will manufacture and sell high performance elastomer seals for the oil and gas industry to customers within the Kingdom of Saudi Arabia as well as export these high performance elastomer seals outside of the Kingdom of Saudi Arabia. The Joint Venture is headquartered in Damman, Saudi Arabia and operates in the Company’s Sealing Solutions reporting unit within the Health & Science Technologies segment. In the fourth quarter of 2020, the Company contributed $147,000 and owns 55% of the share capital while the third party partner contributed $120,000 and owns 45% of the share capital. In late June 2021, the Company contributed an additional $147,000. As of June 30, 2021, the Joint Venture has incurred start-up expenses, but has not yet begun manufacturing. Since IDEX controls the entity, IDEX has consolidated the Joint Venture and recorded a noncontrolling interest in its condensed consolidated financial statements.On June 29, 2021, a subsidiary of IDEX funded a $4.2 million convertible promissory note to a start-up company providing communication technology to improve individual performance and team coordination for firefighters’ responses. The investment aligns with the Fire & Safety/Diversified Products (“FSDP”) segment’s strategic plan to reduce response time and greatly increase life-safety outcomes and is an extension of FSDP’s smart and connected products. The note bears paid-in-kind interest at a rate of 5% per annum and is secured by the Company’s interest in the intellectual property of the start-up company. Unless earlier converted, the principal amount outstanding and the related accrued interest are due upon the earliest of (a) June 28, 2024, (b) a change in control or (c) when declared due and payable by the Company upon an event of default. The note is included in Other noncurrent assets on the Company’s Condensed Consolidated Balance Sheets. The Company will measure the allowance for credit losses under the current expected credit loss model. As of June 30, 2021, no allowance for credit losses has been recorded.

Collaborative Investments

6 Months Ended

Jun. 30, 2021

Equity Method Investments and Joint Ventures [Abstract]

Collaborative Investments On May 12, 2020, a subsidiary of IDEX entered into a joint venture agreement with a third party to form a limited liability company (the “Joint Venture”) that will manufacture and sell high performance elastomer seals for the oil and gas industry to customers within the Kingdom of Saudi Arabia as well as export these high performance elastomer seals outside of the Kingdom of Saudi Arabia. The Joint Venture is headquartered in Damman, Saudi Arabia and operates in the Company’s Sealing Solutions reporting unit within the Health & Science Technologies segment. In the fourth quarter of 2020, the Company contributed $147,000 and owns 55% of the share capital while the third party partner contributed $120,000 and owns 45% of the share capital. In late June 2021, the Company contributed an additional $147,000. As of June 30, 2021, the Joint Venture has incurred start-up expenses, but has not yet begun manufacturing. Since IDEX controls the entity, IDEX has consolidated the Joint Venture and recorded a noncontrolling interest in its condensed consolidated financial statements.On June 29, 2021, a subsidiary of IDEX funded a $4.2 million convertible promissory note to a start-up company providing communication technology to improve individual performance and team coordination for firefighters’ responses. The investment aligns with the Fire & Safety/Diversified Products (“FSDP”) segment’s strategic plan to reduce response time and greatly increase life-safety outcomes and is an extension of FSDP’s smart and connected products. The note bears paid-in-kind interest at a rate of 5% per annum and is secured by the Company’s interest in the intellectual property of the start-up company. Unless earlier converted, the principal amount outstanding and the related accrued interest are due upon the earliest of (a) June 28, 2024, (b) a change in control or (c) when declared due and payable by the Company upon an event of default. The note is included in Other noncurrent assets on the Company’s Condensed Consolidated Balance Sheets. The Company will measure the allowance for credit losses under the current expected credit loss model. As of June 30, 2021, no allowance for credit losses has been recorded.