Fair Value Measurement Fair Value Measurement (Quantitative Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of loans held for investment	$ 21,544	[1]	$ 0
Loans held for sale, fair value	$ 632,273		610,350
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Comparability adjustment	(0.43%)
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Comparability adjustment	(0.06%)
Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Comparability adjustment	(0.27%)
Loans held for investment [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Implied spread	3.26%
Loans held for investment [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Implied spread	4.35%
Loans held for investment [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Implied spread	4.01%
Loans held for sale [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Implied spread	2.68%
Loans held for sale [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Implied spread	7.62%
Loans held for sale [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Implied spread	3.91%
Interest Rate Lock Commitments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Interest rate lock commitments, net	$ 17,711		$ 11,933	$ 5,972
Interest Rate Lock Commitments [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fall out factor	0.60%		0.60%
Value of servicing	0.53%		0.56%
Interest Rate Lock Commitments [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fall out factor	61.16%		77.90%
Value of servicing	1.71%		1.94%
Interest Rate Lock Commitments [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fall out factor	15.80%		21.40%
Value of servicing	0.80%		0.93%

[1] Includes $21.5 million of loans at December 31, 2015 where a fair value option election was made at the time of origination and, therefore, are carried at fair value with changes recognized in the consolidated statements of operations.