Goodwill (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended				0 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Aug. 29, 2014 J.P. Morgan Retirement Plan Services (RPS)
Goodwill [Roll Forward]
Goodwill - beginning balance	$ 105,255		$ 105,255		$ 50,249	[1]
Acquisitions	50,249	[2]	0	[2]	50,249	[2]
Goodwill - ending balance	$ 155,504		$ 105,255

[1] GoodwillGoodwill is calculated as the excess of the purchase price over the net assets recognized and represents the future economic benefits arising from other assets acquired and liabilities assumed that could not be individually identified (Level 3). Total goodwill resulting from the acquisition, in the amount of $50,249, is allocated to the Retirement Services segment. No portion of goodwill is expected to be deductible for tax purposes.

[2] At August 29, 2014, the Company acquired goodwill of $50,249 from the acquisition of RPS. See Note 3 for for additional discussion regarding the acquisition.