PARENT COMPANY CONDENSED FINANCIAL STATEMENTS: (Tables)

12 Months Ended

Dec. 31, 2016

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Schedule of Condensed Balance Sheet

	December 31,
(Dollar amounts in thousands)	2016		2015
ASSETS
Cash deposits in affiliated banks	$	2,765	$	1,782
Investments in subsidiaries	416,024		413,117
Land and headquarters building, net	5,388		5,588
Other	—		12
Total Assets	$	424,177	$	420,499
LIABILITIES AND SHAREHOLDERS' EQUITY
Liabilities
Dividends payable	$	6,104	$	6,243
Other liabilities	3,678		3,940
TOTAL LIABILITIES	9,782		10,183
Shareholders' Equity	414,395		410,316
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$	424,177	$	420,499

Schedule of Condensed Income Statement

CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
	Years Ended December 31,
(Dollar amounts in thousands)	2016			2015			2014
Dividends from subsidiaries	$	31,781		$	19,397		$	26,530
Other income	722			795			724
Other operating expenses	(2,581		)	(2,314		)	(2,747		)
Income before income taxes and equity in undistributed earnings of subsidiaries	29,922			17,878			24,507
Income tax benefit	821			815			1,156
Income before equity in undistributed earnings of subsidiaries	30,743			18,693			25,663
Equity in undistributed earnings of subsidiaries	7,670			11,503			8,109
Net income	$	38,413		$	30,196		$	33,772
Comprehensive income	$	33,650		$	35,324		$	33,212

Schedule of Condensed Cash Flow Statement

CONDENSED STATEMENTS OF CASH FLOWS
	Years Ended December 31,
(Dollar amounts in thousands)	2016			2015			2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$	38,413		$	30,196		$	33,772
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	200			203			196
Equity in undistributed earnings	(7,670		)	(11,503		)	(8,109		)
Contribution of shares to ESOP	1,361			1,294			1,253
Restricted stock compensation	684			684			1,072
Increase (decrease) in other liabilities	(262		)	(1,524		)	(473		)
(Increase) decrease in other assets	12			188			155
NET CASH FROM OPERATING ACTIVITIES	32,738			19,538			27,866
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of furniture and fixtures	—			(65		)	(1,299		)
NET CASH FROM INVESTING ACTIVITIES	—			(65		)	(1,299		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of treasury stock	(19,396		)	(8,698		)	(14,633		)
Dividends paid	(12,359		)	(12,632		)	(12,949		)
NET CASH FROM FINANCING ACTIVITES	(31,755		)	(21,330		)	(27,582		)
NET (DECREASE) INCREASE IN CASH	983			(1,857		)	(1,015		)
CASH, BEGINNING OF YEAR	1,782			3,639			4,654
CASH, END OF YEAR	$	2,765		$	1,782		$	3,639
Supplemental disclosures of cash flow information:
Cash paid during the year for:
Interest	$	—		$	—		$	—
Income taxes	$	18,739		$	12,869		$	9,354