Pension and Other Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Pension and Other Postretirement Benefits [Abstract]

Summary of change in projected benefit obligation, change in plan assets and reconciliation of funded status for the plans

	Pension Benefits
	U.S. Plan						Canadian Plan
	2012			2011			2012			2011
Change in projected benefit obligation
Projected benefit obligation at beginning of year	$	3,829,727		$	3,176,669		$	1,441,482		$	1,262,526
Service cost		—			21,100			—			—
Interest cost		166,534			172,221			58,812			76,866
Benefit payments		(257,958	)		(72,132	)		(94,119	)		(94,262	)
Administrative expenses		(28,019	)		(24,669	)		—			—
Actuarial (gain) loss		389,763			556,538			60,912			227,666
Plan amendments		—			—			—			—
Currency translation adjustment		—			—			33,450			(31,314	)
Settlements		—			—			—			—
Projected benefit obligation at end of year		4,100,047			3,829,727			1,500,537			1,441,482
Change in plan assets
Fair value of plan assets at beginning of year		2,067,871			1,835,326			1,212,167			1,203,920
Actual return on plan assets		227,201			117,350			58,042			44,198
Benefit payments		(257,958	)		(72,132	)		(94,119	)		(94,262	)
Employer contribution		239,830			211,996			83,387			83,036
Administrative expenses		(28,019	)		(24,669	)		—			—
Currency translation adjustment		—			—			28,203			(24,725	)
Fair value of plan assets at end of year		2,248,925			2,067,871			1,287,679			1,212,167
Plan assets (less) greater than benefit obligation	$	(1,851,122	)	$	(1,761,856	)	$	(212,858	)	$	(229,316	)

Summary of net amount recognized on consolidated balance sheets

	U.S. Plan						Canadian Plan
	2012			2011			2012			2011
Non-current liabilities		(1,851,122	)		(1,761,856	)		(212,858	)		(229,316	)
Net amount recognized	$	(1,851,122	)	$	(1,761,856	)	$	(212,858	)	$	(229,316	)

Summary of amount in accumulated other comprehensive loss

	U.S. Plan				Canadian Plan
	2012		2011		2012		2011
Unrecognized net loss	$	1,636,551	$	1,413,239	$	599,824	$	544,514
	$	1,636,551	$	1,413,239	$	599,824	$	544,514

Components of net periodic benefit cost

	U.S. Plan									Canadian Plan
	2012			2011			2010			2012			2011			2010
Components of net periodic benefit cost:
Service cost	$	—		$	21,100		$	21,200		$	—		$	—		$	—
Interest cost		166,534			172,221			174,649			58,812			76,866			78,845
Expected return on plan assets		(154,411	)		(142,104	)		(132,093	)		(73,715	)		(84,452	)		(81,273	)
Net actuarial loss		93,661			51,287			42,191			—			—			—
Amortization of prior service cost		—			—			—			34,007			15,070			7,380
Net periodic benefit cost	$	105,784		$	102,504		$	105,947		$	19,104		$	7,484		$	4,952

Fair value hierarchy of plan assets

		December 31, 2012
		US Plan		Canadian Plan
Cash and cash equivalents	Level 1	$	261,655	$	50,329
Mutual funds	Level 1		254,580		1,237,350
Corporate/Government Bonds	Level 1		693,950
Equities	Level 1		1,038,740		—
Total		$	2,248,925	$	1,287,679

Plans weighted-average allocations by asset category

	December 31, 2012
	US Plan			Canadian Plan
Equities		58	%		39	%
Fixed income		42	%		61	%
Total		100	%		100	%

Expected benefits to be paid by the plans

	U.S. Plan		Canadian Plan
2013	$	135,274	$	94,392
2014		139,104		88,273
2015		135,018		84,060
2016		135,102		79,546
2017		138,280		74,731
2018 through 2022		841,875		245,860

Weighted average assumptions used in computing the benefit obligations for the plans

	U.S. Plan						Canadian Plan
	2012			2011			2012			2011
Weighted average assumptions as of December 31:
Discount rate		3.85	%		4.50	%		3.60	%		4.13	%
Rate of compensation increase		—			—			2.00	%		2.00	%

Computing net pension expense for the plans

	U.S. Plan						Canadian Plan
	2012			2011			2012			2011
Weighted average assumptions as of December 31:
Discount rate		4.50	%		5.50	%		4.13	%		6.25	%
Expected return on plan assets		7.50	%		7.50	%		6.00	%		7.00	%
Rate of compensation increase		—			—			2.00	%		2.00	%