CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash pledged to creditors	$ 52,599	$ 108,174
Mortgage loans held for sale, pledged to creditors	4,846,138	2,478,858
Servicing advances, net, valuation allowance	82,157	70,582
Servicing advances pledged to creditors	207,460	162,895
Mortgage servicing rights, at fair value	2,920,603	2,807,333
Furniture, fixtures, equipment and building improvements pledged to creditors	20,406	16,281
Capitalized software pledged to creditors	$ 12,192	$ 1,017
Common Stock
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares issued	78,515,047	77,494,332
Common stock, shares outstanding	78,515,047	77,494,332