Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net income	$ 17,209	$ 5,517
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	372	243
Premium amortization (discount accretion) and on investment securities, net	(325)	1,263
Recapture of impairment loss on securities previously recognized in earnings	(3)	(12)
Fair value adjustment (gain) loss on equity security	(11)	15
Provision for (recapture of) loan credit losses	(113)	(82)
Provision for (recapture of) securities credit losses	(297)	804
Loss on sale of securities	65	312
Gain on sale of mortgage loans	(25)	0
Origination of loans held for sale	(2,537)	(415)
Proceeds from sale of loans	2,562	0
Changes in assets and liabilities:
Increase in accrued interest receivable and other assets	(1,211)	(585)
Decrease in accrued interest payable, accrued expenses and other liabilities	1,831	244
Net cash provided by operating activities	17,517	7,304
Securities available for sale:
Purchases of securities	(111,508)	(3,474)
Proceeds from calls, maturities, paydowns and sales	80,964	28,378
Securities held to maturity:
Proceeds from calls, maturities and paydowns	5,471	248
Purchase of restricted securities, net	(273)	(112)
Reinvestment of dividends on equity security	(11)	(9)
Net decrease in loans	4,112	9,679
Purchases of premises and equipment	(127)	(48)
Net cash (used in) provided by investing activities	(21,372)	34,662
Cash flows from financing activities
Net increase in noninterest-bearing, savings, interest-bearing checking and money market deposits	326,716	109,142
Net (decrease) increase in time deposits	(4,873)	4,673
Increase in short-term borrowings	5,000	0
Proceeds from stock issuance	12	0
Net cash provided by financing activities	326,855	113,815
Net increase in cash and cash equivalents	323,000	155,781
Cash and cash equivalents, beginning of period	316,767	98,663
Cash and cash equivalents, end of period	639,767	254,444
Supplemental disclosures of cash flow information
Cash payments for interest	2,882	3,087
Cash payments for taxes	2,551	1,047
Supplemental disclosures of noncash investing activities
Net securities loss reclassified into earnings	$ 4,439	$ 666

Recovery Of Impairment Losses Previously Recognized In Earnings

No definition available.

Name:	chnbrdg_RecoveryOfImpairmentLossesPreviouslyRecognizedInEarnings
Namespace Prefix:	chnbrdg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.