Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 133,003	$ 144,909
Short-term investments and interest bearing deposits	139,840	411,983
Securities held-to-maturity (market value of $823,906 in 2012)		773,768
Securities available-for-sale (amortized cost of $2,044,312 in 2013 and $1,290,676 in 2012)	2,018,305	1,291,480
Trading securities	4,816	4,703
Loans	7,694,373	7,429,147
Less: Allowance for loan losses	(179,733)	(183,322)
Unamortized deferred loan fees, net	(11,685)	(10,238)
Loans, net	7,502,955	7,235,587
Federal Home Loan Bank stock	32,918	41,272
Other real estate owned, net	49,141	46,384
Affordable housing investments, net	87,456	85,037
Premises and equipment, net	102,611	102,613
Customers’ liability on acceptances	23,084	41,271
Accrued interest receivable	26,374	26,015
Goodwill	316,340	316,340
Other intangible assets, net	4,113	6,132
Other assets	162,279	166,595
Total assets	10,603,235	10,694,089
Deposits
Non-interest-bearing demand deposits	1,347,134	1,269,455
Interest-bearing deposits:
NOW deposits	629,858	593,133
Money market deposits	1,121,290	1,186,771
Savings deposits	484,704	473,805
Time deposits under $100,000	816,539	644,191
Time deposits of $100,000 or more	3,310,996	3,215,870
Total deposits	7,710,521	7,383,225
Securities sold under agreements to repurchase	950,000	1,250,000
Advances from the Federal Home Loan Bank	126,200	146,200
Other borrowings for affordable housing investments	19,190	18,713
Long-term debt	171,136	171,136
Acceptances outstanding	23,084	41,271
Other liabilities	63,682	54,040
Total liabilities	9,063,813	9,064,585
Commitments and contingencies	0	0
Stockholders’ Equity
Preferred stock, 10,000,000 shares authorized, 129,000 issued and outstanding at June 30, 2013, and 258,000 issued and outstanding at December 31, 2012	128,178	254,580
Common stock, $0.01 par value, 100,000,000 shares authorized, 83,091,449 issued and 78,883,884 outstanding at June 30, 2013, and 82,985,853 issued and 78,778,288 outstanding at December 31, 2012	831	830
Additional paid-in-capital	770,847	768,925
Accumulated other comprehensive (loss)/income, net	(15,073)	465
Retained earnings	771,928	721,993
Treasury stock, at cost (4,207,565 shares at June 30, 2013, and at December 31, 2012)	(125,736)	(125,736)
Total Cathay General Bancorp stockholders' equity	1,530,975	1,621,057
Noncontrolling interest	8,447	8,447
Total equity	1,539,422	1,629,504
Total liabilities and equity	$ 10,603,235	$ 10,694,089