Expense Example (dei_DocumentInformationDocumentAxis, USD $)	0 Months Ended
	May 01, 2013
(Wanger USA) | Wanger USA
Expense Example:
Expense Example, with Redemption, 1 Year	$ 98
Expense Example, with Redemption, 3 Years	306
Expense Example, with Redemption, 5 Years	531
Expense Example, with Redemption, 10 Years	1,178
(Wanger International) | Wanger International
Expense Example:
Expense Example, with Redemption, 1 Year	109
Expense Example, with Redemption, 3 Years	340
Expense Example, with Redemption, 5 Years	590
Expense Example, with Redemption, 10 Years	1,306
(Wanger Select) | Wanger Select
Expense Example:
Expense Example, with Redemption, 1 Year	93
Expense Example, with Redemption, 3 Years	290
Expense Example, with Redemption, 5 Years	504
Expense Example, with Redemption, 10 Years	1,120
(Wanger International Select) | Wanger International Select
Expense Example:
Expense Example, with Redemption, 1 Year	145
Expense Example, with Redemption, 3 Years	449
Expense Example, with Redemption, 5 Years	776
Expense Example, with Redemption, 10 Years	$ 1,702