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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)
In Thousands, unless otherwise specified
Common Stock [Member]
Contributed Capital [Member]
Retained Earnings [Member]
Total
BALANCE at Dec. 31, 2011 $ 422us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
$ 11,693us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
$ 98,567us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
$ 110,682us-gaap_StockholdersEquity
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net earnings 0us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
0us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
27,791us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
27,791us-gaap_NetIncomeLoss
Dividends paid on common stock 0us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
0us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
(2,615)us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
(2,615)us-gaap_DividendsCommonStockCash
BALANCE at Dec. 31, 2012 422us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
11,693us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
123,743us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
135,858us-gaap_StockholdersEquity
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net earnings 0us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
0us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
21,610us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
21,610us-gaap_NetIncomeLoss
Dividends paid on common stock 0us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
0us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
(2,783)us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
(2,783)us-gaap_DividendsCommonStockCash
BALANCE at Dec. 31, 2013 422us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
11,693us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
142,570us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
154,685us-gaap_StockholdersEquity
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net earnings 0us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
0us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
6,523us-gaap_NetIncomeLoss
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
6,523us-gaap_NetIncomeLoss
Dividends paid on common stock 0us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
0us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
(3,711)us-gaap_DividendsCommonStockCash
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
(3,711)us-gaap_DividendsCommonStockCash
BALANCE at Dec. 31, 2014 $ 422us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
$ 11,693us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_AdditionalPaidInCapitalMember
$ 145,382us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RetainedEarningsMember
$ 157,497us-gaap_StockholdersEquity