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Quarterly Results of Operations (Unaudited) - Schedule of Quarterly Results of Operations (Unaudited) (Footnote) (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Gains (losses) on sale of mortgage servicing rights	$ (14,000)	$ 41,200	$ 30,300	$ 26,400	$ 8,492	$ 83,921	$ 0

X

- Definition

Amount of gain (loss) on sale or disposal of assets utilized in financial service operations.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration