Debt (Trust Preferred Securities) (Narrative) (Details) AUD in Millions							1 Months Ended	12 Months Ended
	Dec. 23, 2015 AUD	Oct. 28, 2013 USD ($)	May. 01, 2012	Apr. 30, 2009 USD ($)	Dec. 31, 2008 USD ($)	Feb. 05, 2007 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)		Dec. 31, 2013 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2008 USD ($)	Mar. 31, 2009 USD ($)
Debt Instrument [Line Items]
Debt instrument term								3 years
Trust preferred securities issued						$ 51,500,000
Trust preferred securities issued to third party						50,000,000
Trust preferred securities issued to parent						1,500,000
Interest rate swap								$ 156,000	$ 2,177,000
Investment in common trust securities						1,500,000		838,000	838,000	[1]
Trust preferred dividends paid								1,400,000	1,400,000		$ 1,200,000
Preferred stock dividends payable								$ 198,000	$ 194,000
Marketable securities														$ 11,500,000
Amortization of debt discount | AUD	AUD 2.0
Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Trust preferred securities						$ 51,500,000								$ 22,900,000
Debt instrument term						20 years
Initial interest rate			9.22%
Period of initial interest rate			5 years
LIBOR period			3 months
Spread over LIBOR			4.00%
Interest rate swap		$ 27,900,000
Swap contract rate		1.20%
Fixed interest rate margin		4.00%
Maturity date								Apr. 30, 2027	Apr. 30, 2027
Principal payment								$ 0
Initial period of payoff restriction								5 years
Percentage of principal that may be paid without penalty after initial restriction period								100.00%
Period of waiver on all financial covenants													9 years
Financial covenant waiver payment due					$ 1,600,000			$ 270,000					$ 1,600,000
Financial covenant waiver payment					$ 1,100,000		$ 270,000
Frequency of interest payment								3 months
Extinguishment of debt				$ 22,900,000
Amortization of debt discount												$ 106,000
Gain on retirement of subordinated debt				10,700,000
Write-off of deferred loan costs				$ 749,000

[1] Certain prior period amounts have been reclassified to conform to the current period presentation (see Note 2 - Significant Accounting Policies - Reclassifications).