Parent Company Only Financial Statements (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 141,627	$ 124,184
Investment in bank subsidiary	4,312	4,149
Other assets	12,308	13,468
Total assets	648,877	651,332
Liabilities
Junior subordinated debt securities (at fair value) 12/31/07)	10,068	9,027
Accrued interest payable	71	111
Total liabilities	579,436	589,159
Shareholders' Equity
Common stock, no par value 20,000,000 shares authorized, 14,217,303 and 13,531,832 issued and outstanding, in 2012 and 2011	43,173	41,435
Retained earnings	26,179	21,447
Accumulated other comprehensive loss	89	(709)
Total shareholders' equity	69,441	62,173	73,270
Total liabilities and shareholders' equity	648,877	651,332
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	14,217,303	13,531,832
Common stock, shares outstanding (in shares)	14,217,303	13,531,832
Expense
Interest Expense	2,061	2,964
Other expense	2,276	2,286
Income (Loss) Before Provision for Taxes on Income	7,602	(12,527)
Income tax (benefit) expense	1,533	(1,715)
Deficit in undistributed income of subsidiary	(39)	(418)
Net Income (Loss)	6,069	(10,812)
Cash Flows From Operating Activities:
Net Income (Loss)	6,069	(10,812)
Adjustments to reconcile net income (loss) to cash provided by operating activities
Loss in equity of limited partnership	39	418
Deferred taxes	1,230	(2,398)
Loss on sale of investment in bank stock	(1,807)	0
Net cash provided by operating activities	9,711	5,767
Cash Flows From Investing Activities:
Net cash provided by (used in) investing activities	18,577	35,026
Cash Flows From Financing Activities:
Net cash used in financing activities	(10,845)	(15,039)
Net increase in cash and cash equivalents	17,443	25,754
Cash and cash equivalents at beginning of year	124,184	98,430
Cash and cash equivalents at end of year	141,627	124,184
Parent [Member]
Assets
Cash and cash equivalents	296	16
Investment in bank subsidiary	79,969	72,383
Investment in bank stock	0	24
Other assets	562	515
Total assets	80,827	72,938
Liabilities
Junior subordinated debt securities (at fair value) 12/31/07)	10,068	9,027
Accrued interest payable	0	8
Deferred taxes	1,239	1,594
Other Liabilities	79	136
Total liabilities	11,386	10,765
Shareholders' Equity
Common stock, no par value 20,000,000 shares authorized, 14,217,303 and 13,531,832 issued and outstanding, in 2012 and 2011	43,173	41,435
Retained earnings	26,179	21,447
Accumulated other comprehensive loss	89	(709)
Total shareholders' equity	69,441	62,173
Total liabilities and shareholders' equity	80,827	72,938
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	14,217,303	13,531,832
Common stock, shares outstanding (in shares)	14,217,303	13,531,832
Income
(Loss) Gain on fair value option of financial assets	(774)	1,863
Total (loss) income	(774)	1,863
Expense
Interest Expense	270	248
Other expense	201	136
Total expense	471	384
Income (Loss) Before Provision for Taxes on Income	(1,245)	1,479
Income tax (benefit) expense	(512)	(127)
Deficit in undistributed income of subsidiary	6,802	(12,418)
Net Income (Loss)	6,069	(10,812)
Cash Flows From Operating Activities:
Net Income (Loss)	6,069	(10,812)
Adjustments to reconcile net income (loss) to cash provided by operating activities
Loss in equity of limited partnership	(6,802)	12,418
Deferred taxes	(376)	(572)
Write-down of other investments	68	0
Loss on sale of investment in bank stock	0	2
Gain on fair value option of financial liability	774	(1,863)
Net change in other assets/liabilities	243	790
Net cash provided by operating activities	(24)	(37)
Cash Flows From Investing Activities:
Investment in bank stock	9	12
Proceeds from sale of investment in title company	0	0
Net cash provided by (used in) investing activities	9	12
Cash Flows From Financing Activities:
Proceeds from sale investment in bank stock	295	0
Proceeds from note payable	0	0
Net cash used in financing activities	295	0
Net increase in cash and cash equivalents	280	(25)
Cash and cash equivalents at beginning of year	16	41
Cash and cash equivalents at end of year	296	16
Noncash financing activities:
Dividends declared not paid	$ 0	$ 0