Acquisition (Details) - USD ($)			3 Months Ended		12 Months Ended
	Jan. 01, 2015	Aug. 29, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill			$ 137,683,000	$ 137,683,000	$ 137,683,000	$ 137,683,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill			137,683,000	137,683,000	137,683,000	137,683,000
Decrease in contingent consideration					$ 17,600,000	0	$ 0
J.P. Morgan Retirement Plan Services (RPS)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill				32,428,000		32,428,000		$ 50,249,000
Other intangible assets				16,291,000		16,291,000		0
Fixed assets				12,680,000		12,680,000		12,680,000
Accounts receivable				24,155,000		24,155,000		24,050,000
Other				1,102,000		1,102,000		1,224,000
Total other assets				37,937,000		37,937,000		37,954,000
Total assets acquired and goodwill				86,656,000		86,656,000		88,203,000
Accrued expenses and other				26,880,000		26,880,000		26,108,000
Contingent consideration				32,209,000		32,209,000		33,739,000
Total liabilities assumed and contingent consideration				59,089,000		59,089,000		59,847,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill				(17,821,000)
Other intangible assets				16,291,000
Fixed assets				0
Accounts receivable				105,000
Other				(122,000)
Total other assets				(17,000)
Total assets acquired and goodwill				(1,547,000)
Accrued expenses and other				772,000
Contingent consideration				(1,530,000)
Total other liabilities				(758,000)
Total liabilities assumed and contingent consideration				(758,000)
Goodwill				32,428,000		32,428,000		50,249,000
Discount rate					3.00%
Business Combination, Period After Close of Acquisition		24 months
Minimum contingent consideration potential earnout payment		$ 0
Maximum contingent consideration potential earnout payment		$ 50,000,000
Decrease in contingent consideration			17,600,000
Contingent consideration liability			14,609,000	32,209,000	$ 14,609,000	32,209,000
Contingent consideration				32,209,000		32,209,000		$ 33,739,000
Revenue from acquired entity from date of acquisition					182,759,000	54,267,000
Net loss from acquired entity from date of acquisition					944,000	3,416,000
Acquisition costs				2,859,000		2,859,000
Retirement Services segment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill			137,683,000	137,683,000	137,683,000	137,683,000	105,255,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill			$ 137,683,000	$ 137,683,000	$ 137,683,000	$ 137,683,000	$ 105,255,000
Noncompete agreements | J.P. Morgan Retirement Plan Services (RPS)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Discount rate						14.00%
Customer relationships | J.P. Morgan Retirement Plan Services (RPS)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Discount rate						14.00%
Putnam Retirement Business [Member]
Business Acquisition [Line Items]
Transactions Between Entities Under Common Control, Cash Paid	$ 4,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Transactions Between Entities Under Common Control, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets	12,000
Transactions Between Entities Under Common Control, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Liabilities	8,000
Dividends	$ 0