Acquisition Allocation of Purchase Price table (Details) (USD $)					0 Months Ended	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Aug. 29, 2014 J.P. Morgan Retirement Plan Services (RPS)	Sep. 30, 2014 J.P. Morgan Retirement Plan Services (RPS)	Aug. 29, 2014 J.P. Morgan Retirement Plan Services (RPS)		Aug. 29, 2014 Retirement Services J.P. Morgan Retirement Plan Services (RPS)
Business Acquisition [Line Items]
Goodwill	$ 155,504,000	$ 105,255,000	$ 105,255,000	$ 105,255,000			$ 50,249,000	[1]	$ 50,000	[1]
Months after close date					24 months
Fixed assets							12,680,000	[2]
Accounts receivable							24,050,000	[3]
Other							1,224,000	[3]
Total other assets							37,954,000
Total assets acquired and goodwill							88,203,000
Accrued expenses and other							26,108,000	[3]
Total other liabilities and contingent consideration							59,847,000
Minimum contingent consideration potential earnout payment							0
Maximum contingent consideration potential earnout payment							50,000,000
Fair value of contingent consideration							$ 33,739,000	[4]
Discount rate used in contingent consideration estimate (percent)						3.00%

[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] Fixed AssetsThe fair value of property, plant and equipment and software was determined using a cost approach and a market approach (Level 2). The cost approach is based on current replacement cost and/or reproduction costs of the assets as new less depreciation attributable to physical, functional and economic factors. The market approach is based on market data for similar assets.

[3] Accounts receivable, other assets and accrued expenses and other liabilitiesAccounts receivable, other assets and accrued expenses and other liabilities are current assets and liabilities that are generally carried at fair value which is approximated from the carrying value (Level 2).

[4] Contingent consideration In addition to the cash paid on August 29, 2014, the Company is obligated to make an additional earnout payment based on the retention of aggregated revenue, as defined in the Purchase and Sale Agreement, 24 months after the close date. As such, the remaining earnout payment is due on August 29, 2016. The potential undiscounted amount of the earnout payment that the Company could be required to make under the contingent consideration arrangement is between zero and $50,000. The fair value of the contingent consideration of $33,739 was estimated by a discounted cash flow model (Level 3) which calculates the present value of a probability-weighted earnout using a discount rate of 3.0%.