XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.25.3

Equity and Earnings per Common Share, Non-Controlling Interests in Operating Partnership (Details) - LTIP-OP Units [Member] - Operating Partnership [Member] | Sep. 30, 2025 shares
--- | ---
Noncontrolling Interest in Operating Partnership [Abstract] |
Number of LTIP units owned by non-controlling interest holders in Operating Partnership (in shares) | 576,415
Percentage of operating partnership | 1.71%

X
- Definition Number of shares held by non-controlling interest holders in operating partnerships. + References No definition available. + Details
Name: | chmi_SharesHeldByMinorityInterestInOperatingPartnerships
Namespace Prefix: | chmi_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_MinorityInterestAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_AwardTypeAxis=chmi_LongTermIncentivePlanUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=chmi_OperatingPartnershipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |