Goodwill and other intangibles - Summary of Changes in Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Goodwill
Balances at December 31, 2014		$ 251,868
Acquisitions		7,220
Purchase adjustments		(5,268)
Impairment		(35,000)
Disposals		(168)
Balances at September 30, 2015	$ 218,652	218,652
Title
Goodwill
Balances at December 31, 2014		202,002
Acquisitions		7,220
Purchase adjustments		0
Impairment		0
Disposals		(168)
Balances at September 30, 2015	209,054	209,054
Mortgage Services
Goodwill
Balances at December 31, 2014		49,866
Acquisitions		0
Purchase adjustments		(5,268)
Impairment	(35,000)	(35,000)
Disposals		0
Balances at September 30, 2015	$ 9,598	$ 9,598