Commitments And Contingencies (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Like-kind exchange deposits and reverse exchange property	$ 172,381,000	$ 171,010,000
Independence Title [Member]
Loss Contingencies [Line Items]
Net Premiums Written Percentage	5.50%	10.30%	23.60%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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