Receivables (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Summary of accounts receivable
Total receivables	$ 596,456	$ 298,935
Health Plans
Summary of accounts receivable
Total receivables	561,465	278,300
Molina Medicaid Solutions Segment
Summary of accounts receivable
Total receivables	34,991	20,635
California
Summary of accounts receivable
Total receivables	310,938	148,654
Florida
Summary of accounts receivable
Total receivables	2,141	2,901
Illinois
Summary of accounts receivable
Total receivables	31,594	5,773
Michigan
Summary of accounts receivable
Total receivables	19,880	15,253
New Mexico
Summary of accounts receivable
Total receivables	49,609	17,056
Ohio
Summary of accounts receivable
Total receivables	45,187	43,969
South Carolina
Summary of accounts receivable
Total receivables	4,134	0
Texas
Summary of accounts receivable
Total receivables	29,348	9,736
Utah
Summary of accounts receivable
Total receivables	6,389	10,953
Washington
Summary of accounts receivable
Total receivables	42,848	13,455
Wisconsin
Summary of accounts receivable
Total receivables	8,102	8,087
Direct delivery and other
Summary of accounts receivable
Total receivables	$ 11,295	$ 2,463