Income Taxes - Additional Disclosures (Details) - filing_group	6 Months Ended	12 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Number of U.S. tax return filing groups	1	2

Number of federal income tax return filing groups.

No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration