Stockholders' Equity (Details) (USD $)	1 Months Ended			3 Months Ended			12 Months Ended
	Mar. 31, 2013	Feb. 28, 2013	Jan. 31, 2013	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2010	Dec. 31, 2008	Jan. 25, 2008
Summary of changes in stockholders' equity [Roll Forward]
Balance at beginning of period			$ 262,299,000	$ 262,299,000
Net Income				1,653,000	7,936,000
Issuance of Preferred Stock				23,438,000
Common Stock Dividends				(1,858,000)
Unrealized Foreign Currency Translation Gain				40,000	91,000
Net Change in Fair Value of Derivatives				547,000	1,197,000
Net Change in Funding Status of Defined Benefit Plan				311,000	259,000
Stock-based compensation expense (net of forfeited shares)				108,000
Balance at end of period	286,538,000			286,538,000
Stock Repurchase Program [Abstract]
Shares authorized for repurchase (in shares)								1,000,000
Total number of shares purchased (in shares)	0	0	0			223,051	491,572
Payments for shares purchased						5,200,000	11,500,000
Average Price Paid per Share (in dollars per share)	$ 0	$ 0	$ 0
Total Number of Shares Purchased as Part of Publicly Announced Plan (in shares)	0	0	0
Maximum Number of Shares that May Yet Be Purchased Under the Plan (in shares)	285,377	285,377	285,377	285,377
Dividend Payments [Abstract]
Record Date	Feb. 19, 2013
Payment Date	Mar. 04, 2013
Per Share Amount (in dollars per share)	$ 0.250
Total Dividend Paid	1,803,000			1,826,000	3,004,000
Total dividends paid, excluding dividends related to unvested stock awards				1,803,000
Payment of cash dividends related to unvested stock awards				$ 23,488