Camco Financial Corporation Condensed Financial Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net earnings (loss)	$ 2,784	$ 484	$ 482	$ 413	$ 862	$ 163	$ (1,463)	$ 652	$ 4,163	$ 214	$ (14,559)
Adjustments to reconcile net earnings (loss) to net cash flows provided by operating activities:
Depreciation and amortization									1,376	1,249	1,304
(Gain) loss on sale of premises and equipment, net									2	(15)	(1)
Increase (decrease) in cash, due to changes in:
Prepaid expenses and other assets									1,460	(501)	4,041
Accounts payable and other liabilities									684	(401)	(928)
Net cash provided by (used in) operating activities									10,466	(993)	9,662
Cash flows from investing activities:
Proceeds from sale of office premises									21	1,081	13
Purchase of premises and equipment									(859)	(1,032)	(374)
Proceeds from redemption of life insurance									0	199	160
Net cash provided by (used in) investing activities									17,723	57,302	(6,351)
Cash flows provided by financing activities:
Additional common stock									9,400
Net cash used in financing activities									(8,184)	(47,049)	(12,350)
Net increase (decrease) in cash and cash equivalents									20,005	9,260	(9,039)
Cash and cash equivalents at beginning of year				38,374				29,114	38,374	29,114	38,153
Cash and cash equivalents at end of year	58,379				38,374				58,379	38,374	29,114
Parent Company [Member]
Cash flows from operating activities:
Net earnings (loss)									4,163	214	(14,559)
Adjustments to reconcile net earnings (loss) to net cash flows provided by operating activities:
Equity in undistributed (earnings) loss of Advantage									(5,082)	(1,346)	12,963
Equity in undistributed earnings of Camco Title									0	0	(237)
Depreciation and amortization									1	61	98
(Gain) loss on sale of premises and equipment, net									0	(10)	0
(Gain) loss on sale of investments									(1)	9	0
Increase (decrease) in cash, due to changes in:
Prepaid expenses and other assets									(1)	53	30
Accounts payable and other liabilities									439	352	211
Liquidation of Camco Title									0	567	0
Accrued federal income taxes									0	(4,278)	4,482
Deferred federal income taxes									0	0	3
Net cash provided by (used in) operating activities									(481)	(4,378)	2,991
Cash flows from investing activities:
Net increase in cash surrender value of life insurance									(50)	(55)	(38)
Proceeds from sale of office premises									0	997	0
Purchase of premises and equipment									(7)	(2)	0
Proceeds from sale of investments									8	41	0
Proceeds from redemption of life insurance									0	199	0
Decrease in interest-bearing deposits in other financial institutions									0	262	133
Net cash provided by (used in) investing activities									(49)	1,442	95
Cash flows provided by financing activities:
Additional common stock									5,714	0	0
Warrants									1,411	0	0
Additional paid in capital related to offering									2,256	0	0
Downstream of Cash to Advantage									(9,381)	0	0
Net cash used in financing activities									0	0	0
Net increase (decrease) in cash and cash equivalents									(530)	(2,936)	3,086
Cash and cash equivalents at beginning of year				946				3,882	946	3,882	796
Cash and cash equivalents at end of year	$ 416				$ 946				$ 416	$ 946	$ 3,882