Acquisitions	3 Months Ended
Mar. 31, 2016
Business Combinations [Abstract]
Acquisitions	Acquisitions Consistent with one of its key business strategies of supplementing its book of business through acquisitions, the Company has acquired or agreed to acquire two financial guaranty companies within the last 12 months. CIFG Holding Inc. On April 12, 2016, AGC entered into an agreement and plan of merger to acquire CIFG Holding Inc. ("CIFG"), the parent of financial guaranty insurer CIFG Assurance North America, Inc. ("CIFG NA"). AGC expects to pay $450 million in cash to acquire CIFG, subject to adjustments as contemplated in the agreement, and the acquisition is expected to be completed mid-2016, subject to receipt of anti-trust and insurance regulatory approvals as well as satisfaction of customary closing conditions. CIFG’s stockholders have already approved the acquisition. As part of the transaction, CIFG NA will merge into AGC, which will be the surviving entity. As of December 31, 2015, CIFG had a consolidated insured portfolio of $5.6 billion of net par and approximately $637 million of consolidated qualified statutory capital. Radian Asset Assurance Inc. On April 1, 2015 (“Acquisition Date”), AGC completed the acquisition (“Radian Asset Acquisition”) of all of the issued and outstanding capital stock of financial guaranty insurer Radian Asset Assurance Inc. (“Radian Asset”) for $804.5 million. Radian Asset was merged with and into AGC, with AGC as the surviving company of the merger. The Radian Asset Acquisition added $13.6 billion to the Company's net par outstanding on April 1, 2015. Please refer to Note 2, Acquisition of Radian Asset Assurance Inc., in Part II, Item 8. “Financial Statements and Supplementary Data” of AGL’s Annual Report on Form 10-K for the year ended December 31, 2015 for additional information on the acquisition of Radian Asset including the purchase price and the allocation of the purchase price to net assets acquired and the resulting bargain purchase gain and the gains on settlement of pre-existing relationships.

Acquisitions

3 Months Ended

Mar. 31, 2016

Consistent with one of its key business strategies of supplementing its book of business through acquisitions, the Company has acquired or agreed to acquire two financial guaranty companies within the last 12 months.

CIFG Holding Inc.

On April 12, 2016, AGC entered into an agreement and plan of merger to acquire CIFG Holding Inc. ("CIFG"), the parent of financial guaranty insurer CIFG Assurance North America, Inc. ("CIFG NA"). AGC expects to pay $450 million in cash to acquire CIFG, subject to adjustments as contemplated in the agreement, and the acquisition is expected to be completed mid-2016, subject to receipt of anti-trust and insurance regulatory approvals as well as satisfaction of customary closing conditions. CIFG’s stockholders have already approved the acquisition. As part of the transaction, CIFG NA will merge into AGC, which will be the surviving entity. As of December 31, 2015, CIFG had a consolidated insured portfolio of $5.6 billion of net par and approximately $637 million of consolidated qualified statutory capital.

Radian Asset Assurance Inc.

On April 1, 2015 (“Acquisition Date”), AGC completed the acquisition (“Radian Asset Acquisition”) of all of the issued and outstanding capital stock of financial guaranty insurer Radian Asset Assurance Inc. (“Radian Asset”) for $804.5 million. Radian Asset was merged with and into AGC, with AGC as the surviving company of the merger. The Radian Asset Acquisition added $13.6 billion to the Company's net par outstanding on April 1, 2015.

Please refer to Note 2, Acquisition of Radian Asset Assurance Inc., in Part II, Item 8. “Financial Statements and Supplementary Data” of AGL’s Annual Report on Form 10-K for the year ended December 31, 2015 for additional information on the acquisition of Radian Asset including the purchase price and the allocation of the purchase price to net assets acquired and the resulting bargain purchase gain and the gains on settlement of pre-existing relationships.