Business Segment Information (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets by business segment
Restricted cash	$ 167,313	$ 236,696
Net accounts receivable	301,869	238,185
Investments	171,355	208,313
Pharmaceutical inventory	44,277	49,609
Goodwill	557,425	488,206	426,939
Other intangible assets, net	146,985	69,694
Public Sector
Assets by business segment
Goodwill	20,879	20,882
Specialty Solutions
Assets by business segment
Goodwill	104,549	104,549
Pharmacy Management
Assets by business segment
Goodwill	311,512	242,290
Operating segments | Commercial
Assets by business segment
Restricted cash	11,630	25,107
Net accounts receivable	52,625	50,407
Investments	35,838	16,491
Goodwill	120,485	120,485
Other intangible assets, net	2,772	3,513
Operating segments | Public Sector
Assets by business segment
Restricted cash	148,316	196,651
Net accounts receivable	71,993	62,977
Investments	129,575	92,966
Goodwill	20,879	20,882
Other intangible assets, net	6,831	4,590
Operating segments | Specialty Solutions
Assets by business segment
Net accounts receivable	9,839	7,368
Goodwill	104,549	104,549
Other intangible assets, net	3,012	3,686
Operating segments | Pharmacy Management
Assets by business segment
Net accounts receivable	160,916	115,527
Pharmaceutical inventory	44,277	49,609
Goodwill	311,512	242,290
Other intangible assets, net	134,370	57,905
Corporate and Elimination
Assets by business segment
Restricted cash	7,367	14,938
Net accounts receivable	6,496	1,906
Investments	$ 5,942	$ 98,856