Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	$ 6,180
Guaranteed Investment Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Guaranteed Investment Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,764
Guaranteed Investment Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Guaranteed Investment Contracts [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,764
Mutual Stock Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,135
Mutual Stock Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Mutual Stock Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Mutual Stock Funds [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,135
Equity And Index Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Equity And Index Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	3,281
Equity And Index Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Equity And Index Funds [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	3,281
Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,135
Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	5,045
Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets