Equity and Stock Based Compensation - Narrative (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation [Abstract]
Common Stock shares authorized		30,000,000	30,000,000
Common Stock Par Value		$ 1.00	$ 1.00
Common Stock shares issued		13,094,901	12,911,508
Common Stock Voting Rights		Holders of record of the Company’s common stock for a period of less than 36 consecutive calendar months or less are entitled to 1 vote per share of common stock. Holders of record of the Company’s common stock for a period greater than 36 consecutive calendar months are entitled to 10 votes per share of common stock.
Preferred Stock Shares Authorized		10,000,000
Preferred Stock Par Or Stated Value Per Share		$ 1.00
Public Offering Dollar Amount Securities				$ 100,000
Shares Issued	1,265,000
Proceeds from Issuance of Common Stock	51,233	0	48,143	0
Exercised Options, Intrinsic Value		5,875
Outstanding Options, Intrinsic Value		2,362
Exercisable Options, Intrinsic Value		424
Option Award Vesting Period		3 years
Share Based Compensation [Line Items]
ESPP: Purchase Price Percentage		85.00%
ESPP: Discount from Market Price		15.00%
ESPP: Maximum Ownership of Outstanding Shares		An employee whose stock ownership of the Company exceeds five percent of the outstanding common stock is not eligible to participate in this plan.
Director Stock Ownership Plan Life		ten years
Director Stock Ownership Plan Maximum Number of Shares Authorized Under Plan		75,000
Director Stock Ownership Plan Terms		Currently, each Director who owns less than 7,500 shares of Company Common Stock is required to receive 75% of the annual retainer in Common Stock and 25% of the annual retainer in cash. Each Director who owns 7,500 or more shares of Company Common Stock may elect to receive payment of a percentage (up to 100%) of their annual retainer in shares of common stock.
Director Retainer Annual Fee		40
Restricted Stock [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award		1,691
Weighted Average Remaining Life, Nonvested Stock Awards		1 year 10 months
GAIP Plan [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award		0
Weighted Average Remaining Life, Nonvested Stock Awards		0 years
Restricted Stock Units (RSUs) [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award		$ 51
Weighted Average Remaining Life, Nonvested Stock Awards		2 years 3 months