Condensed Consolidated Statements of Changes in Member’s Equity (Unaudited) - USD ($) $ in Thousands	Total	MEMBERSHIP INTEREST	RETAINED EARNINGS	AOCI	CLECO POWER	CLECO POWER MEMBERSHIP INTEREST	CLECO POWER AOCI
Balances, beginning of period at Dec. 31, 2019	$ 2,643,006	$ 2,454,276	$ 206,243	$ (17,513)	$ 1,713,392	$ 1,735,977	$ (22,585)
Increase (Decrease) in Equity [Roll Forward]
Net income	109,793		109,793		76,156	76,156
Other comprehensive income (loss), net of tax	1,304			1,304	1,409		1,409
Balances, end of period at Sep. 30, 2020	2,754,103	2,454,276	316,036	(16,209)	1,790,957	1,812,133	(21,176)
Balances, beginning of period at Jun. 30, 2020	2,693,358	2,454,276	255,739	(16,657)	1,754,429	1,776,041	(21,612)
Increase (Decrease) in Equity [Roll Forward]
Net income	60,297		60,297		36,092	36,092
Other comprehensive income (loss), net of tax	448			448	436		436
Balances, end of period at Sep. 30, 2020	2,754,103	2,454,276	316,036	(16,209)	1,790,957	1,812,133	(21,176)
Balances, beginning of period at Dec. 31, 2020	2,757,023	2,454,276	328,543	(25,796)	1,807,879	1,832,632	(24,753)
Increase (Decrease) in Equity [Roll Forward]
Net income	219,059		219,059		102,407	102,407
Other comprehensive income (loss), net of tax	304			304	1,286		1,286
Balances, end of period at Sep. 30, 2021	2,976,386	2,454,276	547,602	(25,492)	1,911,572	1,935,039	(23,467)
Balances, beginning of period at Jun. 30, 2021	2,856,380	2,454,276	427,692	(25,588)	1,854,598	1,878,478	(23,880)
Increase (Decrease) in Equity [Roll Forward]
Net income	119,910		119,910		56,561	56,561
Other comprehensive income (loss), net of tax	96			96	413		413
Balances, end of period at Sep. 30, 2021	$ 2,976,386	$ 2,454,276	$ 547,602	$ (25,492)	$ 1,911,572	$ 1,935,039	$ (23,467)