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Escrow and Custodial Funds	3 Months Ended
	Mar. 31, 2018
Deposit Assets Disclosure [Abstract]
Escrow and Custodial Funds	27. Escrow and Custodial Funds In conjunction with the servicing of multi-family and commercial loans, the Company holds escrow and other custodial funds. Escrow funds are held at unaffiliated financial institutions generally in the form of cash and cash equivalents. These funds amounted to approximately $0.8 billion, as of March 31, 2018 and December 31, 2017. These funds are held for the benefit of the Company’s borrowers and are segregated in custodial bank accounts. These amounts are excluded from the assets and liabilities of the Company.

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