Loans Held for Investment Purchased Credit Impaired Loans (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Loans Held for Investment
Total purchase credit impaired	$ 5,392
Commercial and industrial
Loans Held for Investment
Total purchase credit impaired	330
Commercial owner occupied
Loans Held for Investment
Total purchase credit impaired	2,845
Commercial non-owner occupied
Loans Held for Investment
Total purchase credit impaired	2,129
One-to-four family
Loans Held for Investment
Total purchase credit impaired	88
Canyon National
Loans Held for Investment
Total purchase credit impaired	1,553
Canyon National | Commercial and industrial
Loans Held for Investment
Total purchase credit impaired	93
Canyon National | Commercial owner occupied
Loans Held for Investment
Total purchase credit impaired	534
Canyon National | Commercial non-owner occupied
Loans Held for Investment
Total purchase credit impaired	926
Canyon National | One-to-four family
Loans Held for Investment
Total purchase credit impaired	0
Palm Desert National
Loans Held for Investment
Total purchase credit impaired	0
Palm Desert National | Commercial and industrial
Loans Held for Investment
Total purchase credit impaired	0
Palm Desert National | Commercial owner occupied
Loans Held for Investment
Total purchase credit impaired	0
Palm Desert National | Commercial non-owner occupied
Loans Held for Investment
Total purchase credit impaired	0
Palm Desert National | One-to-four family
Loans Held for Investment
Total purchase credit impaired	0
IDPK
Loans Held for Investment
Total purchase credit impaired	3,839
IDPK | Commercial and industrial
Loans Held for Investment
Total purchase credit impaired	237
IDPK | Commercial owner occupied
Loans Held for Investment
Total purchase credit impaired	2,311
IDPK | Commercial non-owner occupied
Loans Held for Investment
Total purchase credit impaired	1,203
IDPK | One-to-four family
Loans Held for Investment
Total purchase credit impaired	$ 88