Parent Company Financial Information (Details 3) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended								12 Months Ended
	Dec. 11, 2012	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 3,811	$ 3,462	$ 5,811	$ 2,692	$ 2,555	$ 2,460	$ 785	$ 4,772	$ 15,776	$ 10,572	$ 4,238
Adjustments to reconcile net income to cash used in operating activities:
Share-based compensation expense										177	208	86
Increase (decrease) in accrued expenses and other liabilities										2,033	(3,500)	(3,113)
Net cash provided by operating activities										12,169	11,997	9,432
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from issuance of common stock, net of issuance cost	31,200									30,958
Repurchase of common stock										(195)	(451)
Net cash provided (used in) financing activities										78,309	(78,878)	17,506
Net increase (decrease) in Cash and cash equivalents										(883)	(3,227)	3,756
Cash and cash equivalents, beginning of year					60,235				63,462	60,235	63,462	59,706
Cash and cash equivalents, end of year		59,352				60,235				59,352	60,235	63,462
Corporation
CASH FLOWS FROM OPERATING ACTIVITIES
Net income										15,776	10,572	4,238
Adjustments to reconcile net income to cash used in operating activities:
Share-based compensation expense										177	208	86
Equity in net earnings of subsidiaries										(16,621)	(11,069)	(4,684)
Increase (decrease) in accrued expenses and other liabilities										154	(192)	81
Increase (decrease) in current and deferred taxes										93	352	(1)
Decrease (increase) in other assets										44	(128)	(53)
Net cash provided by operating activities										(377)	(257)	(333)
CASH FLOWS FROM INVESTING ACTIVITIES
Dividend from Bank										800	3,450
Proceeds from issuance of common stock, net of issuance cost										30,958
Repurchase Pacific Premier Bancorp Warrants											(3,660)
Repurchase of common stock										(195)	(451)
Proceeds from exercise of options and warrants										237	274
Capital contribution to Bank										(25,000)
Net cash provided (used in) financing activities										6,800	(387)
Net increase (decrease) in Cash and cash equivalents										6,423	(644)	(333)
Cash and cash equivalents, beginning of year					604				1,248	604	1,248	1,581
Cash and cash equivalents, end of year		$ 7,027				$ 604				$ 7,027	$ 604	$ 1,248