Segment Reporting - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2
Interest paid	$ 9,474	$ 8,985	$ 9,725
Mortgage Segment
Segment Reporting Information [Line Items]
Interest paid	$ 12,636	$ 8,688	$ 3,647
Mortgage Segment | Prime Interest Rate
Segment Reporting Information [Line Items]
Warehouse line of credit interest rate	3.75%	3.50%	3.25%