Consolidated Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated net income	$ 123,407	$ 107,962	$ 98,314
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(4,539)	6,838	(2,345)
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during period	2,408	1,455	(773)
Reclasification of (gains) losses included in net income	(2,631)	(344)	(166)
Other comprehensive income (loss)	(4,762)	7,949	(3,284)
Comprehensive income	118,645	115,911	95,030
Comprehensive (income) loss attributable to noncontrolling interest	345	268	(179)
Comprehensive income attributable to Morningstar, Inc.	$ 118,990	$ 116,179	$ 94,851