Fair Value of Financial Instruments - Fair Value Hierarchy (Details) (Recurring Fair Value Measurements [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Assets:
Total assets	$ 1,954	$ 1,861
Liabilities:
Total liabilities	838	782
Deferred compensation plans [Member]
Liabilities:
Total liabilities	838	782
Marketable securities [Member]
Assets:
Total assets	838	782
Cash surrender value of life insurance policies [Member]
Assets:
Total assets	1,116	1,079
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Assets:
Total assets	838	782
Liabilities:
Total liabilities	838	782
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Deferred compensation plans [Member]
Liabilities:
Total liabilities	838	782
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Marketable securities [Member]
Assets:
Total assets	838	782
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash surrender value of life insurance policies [Member]
Assets:
Total assets	0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total assets	1,116	1,079
Liabilities:
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member] | Deferred compensation plans [Member]
Liabilities:
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member] | Marketable securities [Member]
Assets:
Total assets	0	0
Significant Other Observable Inputs (Level 2) [Member] | Cash surrender value of life insurance policies [Member]
Assets:
Total assets	1,116	1,079
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Total assets	0	0
Liabilities:
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) [Member] | Deferred compensation plans [Member]
Liabilities:
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) [Member] | Marketable securities [Member]
Assets:
Total assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Cash surrender value of life insurance policies [Member]
Assets:
Total assets	$ 0	$ 0