Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Details) (Fair Value, Measurements, Nonrecurring, USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans receivable, impaired, fair value disclosure	$ 57,302	$ 74,623
Real estate acquired through foreclosure, fair value disclosure	8,502	15,745
Long-lived assets to be disposed, fair value disclosure	1,186	496
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans receivable, impaired, fair value disclosure	0	0
Real estate acquired through foreclosure, fair value disclosure	0	0
Long-lived assets to be disposed, fair value disclosure	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans receivable, impaired, fair value disclosure	0	0
Real estate acquired through foreclosure, fair value disclosure	0	0
Long-lived assets to be disposed, fair value disclosure	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans receivable, impaired, fair value disclosure	57,302	74,623
Real estate acquired through foreclosure, fair value disclosure	8,502	15,745
Long-lived assets to be disposed, fair value disclosure	1,186	496
Estimate of Fair Value, Fair Value Disclosure, Gain (Loss)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans receivable, impaired, fair value disclosure	(23,224)	(32,624)
Real estate acquired through foreclosure, fair value disclosure	(14,441)	(20,797)
Long-lived assets to be disposed, fair value disclosure	$ (599)	$ (70)