Parent Company financial statements - Condensed Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 5,721	$ 10,589	$ 10,531
Adjustments:
Decrease (increase) in other assets	1,406	607	1,221
Increase (decrease) in other liabilities	1,048	123	(931)
Stock based compensation	25	40
Deferred income tax expense	(1,143)	353	217
Net cash provided by operating activities	9,815	12,602	13,937
Cash flows from investing activities:
Proceeds from sale of available-for-sale securities	4,573	5,821	15,318
Purchase of available-for-sale securities	(15,262)	(46,297)	(28,312)
Net cash provided by (used in) investing activities	(14,917)	19,661	11,196
Cash flows from financing activities:
Cash dividends paid	(5,511)	(5,504)	(5,504)
Net cash provided by (used in) financing activities	8,568	(18,899)	(4,872)
Increase in cash	3,466	13,364	20,261
Cash and cash equivalents at beginning of year	47,844	34,480	14,219
Cash and cash equivalents at end of year	51,310	47,844	34,480
Peoples Bank [Member]
Cash flows from operating activities:
Net income	5,721	10,589	10,531
Adjustments:
Net realized losses (gains) on sales of securities	(103)	(136)	(459)
Other than temporary security impairment			78
Undistributed net income of subsidiaries	2,689	(5,038)	(4,803)
Decrease (increase) in other assets	(1,733)		1
Increase (decrease) in other liabilities	641	(28)	141
Stock based compensation	25	40
Deferred income tax expense	1	36	10
Increase in due from subsidiaries	(1,611)
Net cash provided by operating activities	5,630	5,463	5,499
Cash flows from investing activities:
Proceeds from sale of available-for-sale securities	253	145	467
Purchase of available-for-sale securities		(103)	(300)
Net cash provided by (used in) investing activities	253	42	167
Cash flows from financing activities:
Cash dividends paid	(5,511)	(5,504)	(5,504)
Net cash provided by (used in) financing activities	(5,511)	(5,504)	(5,504)
Increase in cash	372	1	162
Cash and cash equivalents at beginning of year	2,785	2,784	2,622
Cash and cash equivalents at end of year	$ 3,157	$ 2,785	$ 2,784